one side of the panel is accessible such as box or tube section. apologies, I was attempting to be humorous with my M5.5 comment. 
Reliable data that is specific to your application can only be obtained by doing a test installation of fasteners into your specific application and measuring the engineering data that results from such a test installation. The Best Online Slot Games to Play at Rainbow Riches. (Read Lug Nut Socket Size Chart). If a chart is not available from the supplier, you can also measure the outside diameter of the rivnut from the underside of the head. Different materials can call for different sizes! Now that you've got your Rivnuts, it's important to ensure the correct sized hole is drilled to ensure a proper fit for the Rivnut to be installed. For more information don't hesitate to contact us at WA Fasteners for more information. For a better experience, please enable JavaScript in your browser before proceeding. The 9mm drill bit definitely worked better but I'm finding it way too easy to strip the threads out of the rivnuts during installation. The following for your reference only data is provided as information that might relate to your specific application. The first thing to remember is that various providers make rivnuts to different specifications; thus, the hole size will change. Rivet nuts have an advantage over other captivated fasteners because they can be installed on site or used for, repair work to replace a previously installed fastener that has failed. If you've purchased Rivnuts from WA Fasteners, use the following chart as a guide of what sized hole is required. Yeah, I'm familiar with the pop-rivet type installation tools.
How are rivnuts measured and what eyebolt fits?
Strange, I've had a nutsert tool for years, 2 in fact, one Lawson, one Snap On, that use the thread to set the insert, works excellent. This chart covers products made from steel only. (Type)-(Thread code)-(Grip Code)-(Material/Finish code), FHRS/F-M6-30-SZ (Flat Head Full Hexagon Rivet Nut-M6-suitable for 0.5-, 3.0mm sheet thickness-electro zinc plated steel), FHRS/F-M8-35-A2 (Flat Head Full Hexagon Rivet Nut-M8-suitable for 1.0-. As you can see on our Rivnut Chart for Steel Rivnuts, 13.5mm is what is listed.
The RIVNUT complete fastening system includes hand and power tools for low to high production use. Nutserts are a threaded anchor point for bolting applications that are tubular fasteners. For a better experience, please enable JavaScript in your browser before proceeding. Other sizes are subject to availability or special order. I ordered from Liberty. To allow for 360-degree movement, all thicker materials will require larger holes. The tool-held Thin Sheet Nutsert is inserted into a prepared hole, and the tool pulls the threaded section until the fasteners wall collapses radially outward, securing it to the sheet. Save my name, email, and website in this browser for the next time I comment.
If the supplier does not have a chart, you can measure the outside diameter from the bottom of the head. A Nutsert, a branded name for the generically referred to rivet nut, is a tubular shaped metal fastener with internal threads. If you had a lever action like this.
It must be that your tool spins the nut as it is tightened . _ oh as others have mentioned, I will usually cross reference the metric standard to whatever I have in SEA or whatever is close enough. Others call for 9mm. Theyre a permanent fixture that necessitates using a manual nutsert tool or an air/cordless nutsert gun. If you'll snug up the assembly. Body measurements: 0.350 , measurements: 4 x 0.355 Sizes of holes: 0.354 -0.356 percent.
Made of Zinc Plated Steel. The advantage of installation from one side of. For example, the M4 rivnuts I have on my desk require a 6.35mm hole. By clicking on the following links, you acknowledge that the data provided is for your reference only. Rivnuts come rated for different thickness ranges, and yours may not be good for what you tried it in. (Read Spark Plug Sockets Sizes), Your email address will not be published. Panel thickness ranges shown are preferred range. Below is an M8 Large Flange Steel Rivnut, when measured correctly it shows 13.44mm meaning we would use a 13.5mm Drill Bit. #10-32 pre-bulbed plus nut hole size is 8mm. Riding Lawn Mower With Snow Blower Attachment. That's .250" for those who don't feel like doing the conversion in their heads. In addition, the A-T Series Knurled Threaded Insert can be placed in materials up to.030/76 mm thick. We use cookies to ensure that we give you the best experience on our website. When employing thinner metal, the situation may be similar or identical. We tested three different COO's of rivet nuts in blind tests before making ours - the factory making ours in China was the best, that's the long and short of it. For more information, please review our Install Tools Page. systems are constantly assessed and improved. Each rivnut requires a tool die set to utilize them. JavaScript is disabled. Now, if we look at an M8 Large Flange Aluminium Rivnuts, you will notice the measurement is now 10.83mm which will require a 11mm Drill Bit. Get the spec sheet on your rivnuts before you go wasting money on metric drill bits.
OM646 4cyl 80KW 109HP engine. See my edit: S and T are between those two sizes. I measured it myself with a caliper, so it's a bit strange the table is different. This is done to achieve a perfect fit at all times and to correct for thread shrinkage during the installation process. (I must be googling the wrong thing). mechanical properties & technical data for Bollhoff Rivnuts, mechanical properties & technical data for Bollhoff Plusnuts. Here you can find our first rivet nut size chart you can use for your repair task and drill size for your 5/16 nutsert drill size. Before you spend your money or mess up the project,that asking advice and trial and error is a good thing.Whether its metric,number or letter drill you probably will end up at a speciality drill sales.It will cost more,most definitely, but if you buy just one bit and get a good job thats o.k.Any time you buy a kit and everything is not furnished,there is a certain learning curve.I've used Grainger in the past,ordered one day,and p.u. RIVNUT fasteners have been providing engineers with fastening solutions for 80 years. 0.351-0.356 Its important to remember that the parent items thickness and substance determine the installation requirements. The few metric rivnuts I've used, all had stated weird metric drill sizes that actually work out to SAE drill diameters. document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); We are reader-supported and this article may contain affiliate links. Thanks, M5.5 is probably right (I've tried M5 and M6). How has Digitalization completely changed the online gaming industry? Do note that some Rivnuts are tapered so it's important to measure the largest section. You will need a 9/16 drill bit for 3/8 nutserts.
Otherwise you will have to purchase a rivet gun that contains the rivnut inserts that you choose to use. * Specify thread (12)M10 or (15)M12. The larger the hole size in the material, the more 360 installation swaging is required before the rivnut is installed. We use cookies to ensure that we give you the best experience on our website. Each brand of rivnuts have there dimensions required for the hole. I use Astro's rivnuts and so far I've use the 6mm size and the appropriate drill for the 6mm Astro seems to be 23/64". 2007 Dodge Sprinter 170 NCV3 Passenger Van, For an 8mm hole you will probably want an M5.5 according to this table. Also rivnuts are not nutserts.
The threads are pulling out while the rivnut is being drawn up. Rivnut or Rivet Nut Fasteners and Self Locking Nuts.
Took to long to edit after hitting enter by accident, the nuts you posted are 1/4 with 20 threads per inch or 1/4-20 so that would be the size of eye bolt needed. If 23/64" is too big and 11/32" is too small, I'm not too sure what good a chart is going to do. Thanks. We're currently in the manufacturing stage of a tool just for this, single bit that does SAE and Metric Rivnuts for 22-30 different sizes and brands of rivet nuts. on the SuperCub.Org web site. Why not just measure the rivnut your using with a dial caliper and then use the next biggest sized drill on the Starrett drill chart? Some parts and items have limited availability. There are a couple places that sell for reasonable prices in small quantities. Note: Before specifying hole size, it is essential to test the application to ensure the recommended size can hold the materials, or if you need to change the size of rivnut to be installed. The larger the hole, the more 360 installation swaging is required. The first thing to note, all suppliers manufacture rivnuts to different specs and the hole size will vary. Liberty Engineering Rivnut or Rivet Nut Fasteners and Self Locking Nuts. Thread pitch: 10-24. Required fields are marked *. Maybe I missed it but. it's not the job of the knurling on the rivnut that stops it from turning during installation. the application means that access to the back of the panel is never required. Maybe I missed it but. it's not the job of the knurling on the rivnut that stops it from turning during installation. This is the previous RivnutCatalog. So if you're not grabbing with a 23/64" hole, maybe you're using the rivnut in something outside of it's grip range. Drilled Hole Size is 17/32 (13.5 mm). maximum hardness limitations of self-clinching nuts so are suitable for installation into hard or non-ductile panels. Good info.
The Auveco Thin Sheet Nutsert secures threads from one side of work in the material that is too thin to sustain threads. Northern Precision Ltd operate a quality management, The ISO 9001 standard is recognised worldwide and, you can be assured of the benefits of working with a, certified company knowing that our management. That's why you are needing to get it to bite in the hole.
9/16 There are ten different thread size inputs, each with its own drill size, thickness, and other options. Rivnuts are an amazing product that can provide threads in materials too thin for tapping, or in blind holes with no access. Two different technologies completely. I have been getting refills on the nut-serts from. This tool does pull it. In our guide, you can learn the nutsert sizes you need by using our nutsert hole size chart they recommend to meet your task. The thickness and density of the underlying product material required is important for the rivet nut installation hole size for your repair. Before you spend your money or mess up the project,that asking advice and trial and error is a good thingAlso trying to wallow a drill bit around doesn't get consistency, Depending on the application and material,a few thousandths ,makes or breaks when maching a special hole,thats why you will probably end up with a non hard ware store driil bit.Good luck,keep us informed. As an Amazon Associate, we earn from qualifying purchases. https://www.pegasusautoracing.com/productdetails.asp?RecID=24927, http://www.gearhob.com/eng/design/drill_eng.htm, https://www.amazon.com/Titanium-Drill-3-12mm-Power-Drilling/dp/B01MYXGO5V, https://www.eurosportacc.com/producMIypyItM7k1QIV2IWzCh0kWwyjEAQYBiABEgL31vD_BwE, The rivnut assortment I bought is made in China, https://www.lawsonproducts.com/lawson/Standard/85897.lp. Aluminum 1/4-20 rivet nuts body diameter:0.350, application Hole Size:0.351-0.356, grip range:0.020-0.120. If you have a rivet gun that has the proper insert dies to accommodate the rivnuts then you can. (Read Light Bulb Base Chart). All of the materials utilized in the A-T series are tin or cadmium-coated. MWB High roof 2008 Mercedes Sprinter 311 CDi (UK RHD) in the faster DHL Yellow colour (Broom Yellow MB1212). What, like a step drill with rivnut sized steps? Branded types of rivets nuts include Nutsert by Avdel, Rivnut by Bollhoff and Rivkle by Bollhoff.
Note: Some Rivnuts are tapered. This entire repair process takes seconds, and anyone can do it. Unit 1, 85 Dixon Road,Rockingham 6168WA Australia, Consult the Suppliers Chart to confirm correct size hole for drilling, Measure the Rivnut at the largest part under the head to get closest measurement, Test drilling the hole on a piece of scrap metal and ensure a snug fit for Rivnut. Another crucial point is that the A-T series inserts are somewhat larger.
If you bought Rivnuts from WA Fasteners, check the chart below to figure out what size hole youll need. Wow, that would make a great companion for your new rivnut tool. What should a mental health SOAP note include? The A-T Insert can now be used with Grade 8/Metric 12.9 screws.
Now that you have your Rivnuts, test to ensure you drill a suitable size hole for a proper fit for the Rivnut. Use some antiseize on the installation tool, this will help. It may not display this or other websites correctly.
Click here to get mechanical properties & technical data for Bollhoff Rivnuts, Click here to get mechanical properties & technical data for Bollhoff Plusnuts. Rivet Nut USA, Cardinal Components or Bollhoff does not imply that this for your reference only data is specific to your application. The tool is removed, revealing the Thin Sheet Nutsert for a bolt or screw. The problem is that I'm working in a confined space. If interested, please contact us for the timeline and costs associated for initiating a test installation that will provide data specific to your application.
Flat Head Full Hexagon Rivet nuts provide a strong captivated thread in thin panels and in applications where only. Oddly, this seems to be really hard to find out! You are using an out of date browser. Your email address will not be published.
NAS1329 and NAS1330 standards include Rivnut fasteners with thread-locking requirements to MIL-N-25027. 1/4-20 spline nuts made of aluminum. This is my first time using rivnuts. Specifications: When specified on your purchase order the Rivnut fasteners featured in this catalog can meet the requirements of NAS1329, NAS1330, MS 27130 standards, and a wide range of ordinance drawings.
That's the job of the static holder. This does not cost you anything. 17/32 For assistance in selecting tools to install aluminum or stainless steel products please contact us at800-236-3200or by email:sales@rivetnutusa.com, Blind rivet nut fasteners for sheet metal and tubular structures. Sounds like a problem with the tool not the rivet nut, you should be pulling a rivet nut to set it - not threading/turning it. Ok, so it sounds like yours are the type that require a 9mm hole.
Reliable data that is specific to your application can only be obtained by doing a test installation of fasteners into your specific application and measuring the engineering data that results from such a test installation. The Best Online Slot Games to Play at Rainbow Riches. (Read Lug Nut Socket Size Chart). If a chart is not available from the supplier, you can also measure the outside diameter of the rivnut from the underside of the head. Different materials can call for different sizes! Now that you've got your Rivnuts, it's important to ensure the correct sized hole is drilled to ensure a proper fit for the Rivnut to be installed. For more information don't hesitate to contact us at WA Fasteners for more information. For a better experience, please enable JavaScript in your browser before proceeding. The 9mm drill bit definitely worked better but I'm finding it way too easy to strip the threads out of the rivnuts during installation. The following for your reference only data is provided as information that might relate to your specific application. The first thing to remember is that various providers make rivnuts to different specifications; thus, the hole size will change. Rivet nuts have an advantage over other captivated fasteners because they can be installed on site or used for, repair work to replace a previously installed fastener that has failed. If you've purchased Rivnuts from WA Fasteners, use the following chart as a guide of what sized hole is required. Yeah, I'm familiar with the pop-rivet type installation tools. How are rivnuts measured and what eyebolt fits?
Strange, I've had a nutsert tool for years, 2 in fact, one Lawson, one Snap On, that use the thread to set the insert, works excellent. This chart covers products made from steel only. (Type)-(Thread code)-(Grip Code)-(Material/Finish code), FHRS/F-M6-30-SZ (Flat Head Full Hexagon Rivet Nut-M6-suitable for 0.5-, 3.0mm sheet thickness-electro zinc plated steel), FHRS/F-M8-35-A2 (Flat Head Full Hexagon Rivet Nut-M8-suitable for 1.0-. As you can see on our Rivnut Chart for Steel Rivnuts, 13.5mm is what is listed.
The RIVNUT complete fastening system includes hand and power tools for low to high production use. Nutserts are a threaded anchor point for bolting applications that are tubular fasteners. For a better experience, please enable JavaScript in your browser before proceeding. Other sizes are subject to availability or special order. I ordered from Liberty. To allow for 360-degree movement, all thicker materials will require larger holes. The tool-held Thin Sheet Nutsert is inserted into a prepared hole, and the tool pulls the threaded section until the fasteners wall collapses radially outward, securing it to the sheet. Save my name, email, and website in this browser for the next time I comment.
If the supplier does not have a chart, you can measure the outside diameter from the bottom of the head. A Nutsert, a branded name for the generically referred to rivet nut, is a tubular shaped metal fastener with internal threads. If you had a lever action like this. It must be that your tool spins the nut as it is tightened . _ oh as others have mentioned, I will usually cross reference the metric standard to whatever I have in SEA or whatever is close enough. Others call for 9mm. Theyre a permanent fixture that necessitates using a manual nutsert tool or an air/cordless nutsert gun. If you'll snug up the assembly. Body measurements: 0.350 , measurements: 4 x 0.355 Sizes of holes: 0.354 -0.356 percent.
Made of Zinc Plated Steel. The advantage of installation from one side of. For example, the M4 rivnuts I have on my desk require a 6.35mm hole. By clicking on the following links, you acknowledge that the data provided is for your reference only. Rivnuts come rated for different thickness ranges, and yours may not be good for what you tried it in. (Read Spark Plug Sockets Sizes), Your email address will not be published. Panel thickness ranges shown are preferred range. Below is an M8 Large Flange Steel Rivnut, when measured correctly it shows 13.44mm meaning we would use a 13.5mm Drill Bit. #10-32 pre-bulbed plus nut hole size is 8mm. Riding Lawn Mower With Snow Blower Attachment. That's .250" for those who don't feel like doing the conversion in their heads. In addition, the A-T Series Knurled Threaded Insert can be placed in materials up to.030/76 mm thick. We use cookies to ensure that we give you the best experience on our website. When employing thinner metal, the situation may be similar or identical. We tested three different COO's of rivet nuts in blind tests before making ours - the factory making ours in China was the best, that's the long and short of it. For more information, please review our Install Tools Page. systems are constantly assessed and improved. Each rivnut requires a tool die set to utilize them. JavaScript is disabled. Now, if we look at an M8 Large Flange Aluminium Rivnuts, you will notice the measurement is now 10.83mm which will require a 11mm Drill Bit. Get the spec sheet on your rivnuts before you go wasting money on metric drill bits.
OM646 4cyl 80KW 109HP engine. See my edit: S and T are between those two sizes. I measured it myself with a caliper, so it's a bit strange the table is different. This is done to achieve a perfect fit at all times and to correct for thread shrinkage during the installation process. (I must be googling the wrong thing). mechanical properties & technical data for Bollhoff Rivnuts, mechanical properties & technical data for Bollhoff Plusnuts. Here you can find our first rivet nut size chart you can use for your repair task and drill size for your 5/16 nutsert drill size. Before you spend your money or mess up the project,that asking advice and trial and error is a good thing.Whether its metric,number or letter drill you probably will end up at a speciality drill sales.It will cost more,most definitely, but if you buy just one bit and get a good job thats o.k.Any time you buy a kit and everything is not furnished,there is a certain learning curve.I've used Grainger in the past,ordered one day,and p.u. RIVNUT fasteners have been providing engineers with fastening solutions for 80 years. 0.351-0.356 Its important to remember that the parent items thickness and substance determine the installation requirements. The few metric rivnuts I've used, all had stated weird metric drill sizes that actually work out to SAE drill diameters. document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); We are reader-supported and this article may contain affiliate links. Thanks, M5.5 is probably right (I've tried M5 and M6). How has Digitalization completely changed the online gaming industry? Do note that some Rivnuts are tapered so it's important to measure the largest section. You will need a 9/16 drill bit for 3/8 nutserts.
Otherwise you will have to purchase a rivet gun that contains the rivnut inserts that you choose to use. * Specify thread (12)M10 or (15)M12. The larger the hole size in the material, the more 360 installation swaging is required before the rivnut is installed. We use cookies to ensure that we give you the best experience on our website. Each brand of rivnuts have there dimensions required for the hole. I use Astro's rivnuts and so far I've use the 6mm size and the appropriate drill for the 6mm Astro seems to be 23/64". 2007 Dodge Sprinter 170 NCV3 Passenger Van, For an 8mm hole you will probably want an M5.5 according to this table. Also rivnuts are not nutserts.
The threads are pulling out while the rivnut is being drawn up. Rivnut or Rivet Nut Fasteners and Self Locking Nuts.
Took to long to edit after hitting enter by accident, the nuts you posted are 1/4 with 20 threads per inch or 1/4-20 so that would be the size of eye bolt needed. If 23/64" is too big and 11/32" is too small, I'm not too sure what good a chart is going to do. Thanks. We're currently in the manufacturing stage of a tool just for this, single bit that does SAE and Metric Rivnuts for 22-30 different sizes and brands of rivet nuts. on the SuperCub.Org web site. Why not just measure the rivnut your using with a dial caliper and then use the next biggest sized drill on the Starrett drill chart? Some parts and items have limited availability. There are a couple places that sell for reasonable prices in small quantities. Note: Before specifying hole size, it is essential to test the application to ensure the recommended size can hold the materials, or if you need to change the size of rivnut to be installed. The larger the hole, the more 360 installation swaging is required. The first thing to note, all suppliers manufacture rivnuts to different specs and the hole size will vary. Liberty Engineering Rivnut or Rivet Nut Fasteners and Self Locking Nuts. Thread pitch: 10-24. Required fields are marked *. Maybe I missed it but. it's not the job of the knurling on the rivnut that stops it from turning during installation. the application means that access to the back of the panel is never required. Maybe I missed it but. it's not the job of the knurling on the rivnut that stops it from turning during installation. This is the previous RivnutCatalog. So if you're not grabbing with a 23/64" hole, maybe you're using the rivnut in something outside of it's grip range. Drilled Hole Size is 17/32 (13.5 mm). maximum hardness limitations of self-clinching nuts so are suitable for installation into hard or non-ductile panels. Good info.
The Auveco Thin Sheet Nutsert secures threads from one side of work in the material that is too thin to sustain threads. Northern Precision Ltd operate a quality management, The ISO 9001 standard is recognised worldwide and, you can be assured of the benefits of working with a, certified company knowing that our management. That's why you are needing to get it to bite in the hole.
9/16 There are ten different thread size inputs, each with its own drill size, thickness, and other options. Rivnuts are an amazing product that can provide threads in materials too thin for tapping, or in blind holes with no access. Two different technologies completely. I have been getting refills on the nut-serts from. This tool does pull it. In our guide, you can learn the nutsert sizes you need by using our nutsert hole size chart they recommend to meet your task. The thickness and density of the underlying product material required is important for the rivet nut installation hole size for your repair. Before you spend your money or mess up the project,that asking advice and trial and error is a good thingAlso trying to wallow a drill bit around doesn't get consistency, Depending on the application and material,a few thousandths ,makes or breaks when maching a special hole,thats why you will probably end up with a non hard ware store driil bit.Good luck,keep us informed. As an Amazon Associate, we earn from qualifying purchases. https://www.pegasusautoracing.com/productdetails.asp?RecID=24927, http://www.gearhob.com/eng/design/drill_eng.htm, https://www.amazon.com/Titanium-Drill-3-12mm-Power-Drilling/dp/B01MYXGO5V, https://www.eurosportacc.com/producMIypyItM7k1QIV2IWzCh0kWwyjEAQYBiABEgL31vD_BwE, The rivnut assortment I bought is made in China, https://www.lawsonproducts.com/lawson/Standard/85897.lp. Aluminum 1/4-20 rivet nuts body diameter:0.350, application Hole Size:0.351-0.356, grip range:0.020-0.120. If you have a rivet gun that has the proper insert dies to accommodate the rivnuts then you can. (Read Light Bulb Base Chart). All of the materials utilized in the A-T series are tin or cadmium-coated. MWB High roof 2008 Mercedes Sprinter 311 CDi (UK RHD) in the faster DHL Yellow colour (Broom Yellow MB1212). What, like a step drill with rivnut sized steps? Branded types of rivets nuts include Nutsert by Avdel, Rivnut by Bollhoff and Rivkle by Bollhoff.
Note: Some Rivnuts are tapered. This entire repair process takes seconds, and anyone can do it. Unit 1, 85 Dixon Road,Rockingham 6168WA Australia, Consult the Suppliers Chart to confirm correct size hole for drilling, Measure the Rivnut at the largest part under the head to get closest measurement, Test drilling the hole on a piece of scrap metal and ensure a snug fit for Rivnut. Another crucial point is that the A-T series inserts are somewhat larger.
If you bought Rivnuts from WA Fasteners, check the chart below to figure out what size hole youll need. Wow, that would make a great companion for your new rivnut tool. What should a mental health SOAP note include? The A-T Insert can now be used with Grade 8/Metric 12.9 screws.
Now that you have your Rivnuts, test to ensure you drill a suitable size hole for a proper fit for the Rivnut. Use some antiseize on the installation tool, this will help. It may not display this or other websites correctly.
Click here to get mechanical properties & technical data for Bollhoff Rivnuts, Click here to get mechanical properties & technical data for Bollhoff Plusnuts. Rivet Nut USA, Cardinal Components or Bollhoff does not imply that this for your reference only data is specific to your application. The tool is removed, revealing the Thin Sheet Nutsert for a bolt or screw. The problem is that I'm working in a confined space. If interested, please contact us for the timeline and costs associated for initiating a test installation that will provide data specific to your application.
Flat Head Full Hexagon Rivet nuts provide a strong captivated thread in thin panels and in applications where only. Oddly, this seems to be really hard to find out! You are using an out of date browser. Your email address will not be published.
NAS1329 and NAS1330 standards include Rivnut fasteners with thread-locking requirements to MIL-N-25027. 1/4-20 spline nuts made of aluminum. This is my first time using rivnuts. Specifications: When specified on your purchase order the Rivnut fasteners featured in this catalog can meet the requirements of NAS1329, NAS1330, MS 27130 standards, and a wide range of ordinance drawings.
That's the job of the static holder. This does not cost you anything. 17/32 For assistance in selecting tools to install aluminum or stainless steel products please contact us at800-236-3200or by email:sales@rivetnutusa.com, Blind rivet nut fasteners for sheet metal and tubular structures. Sounds like a problem with the tool not the rivet nut, you should be pulling a rivet nut to set it - not threading/turning it. Ok, so it sounds like yours are the type that require a 9mm hole.