The solution is a nylock nut. Using nylock nuts allows you to use it repeatedly without damaging the threads of screws, but it comes at the cost of damaging the nylon present in the nut. The values shown in the chart are to be used as a mid-range guideline. The outside diameter of the ring is constrained, so the inside diameter must allow this deformation without overfilling the mating thread, or the ring can be pushed out of the nut. Thread Coeff Friction Preload (Kn) Property class Tightening Torque (Nm) Property class Min Breaking Torque; A1-50 A2-70 A4-80 A1-50 A2-70 A4-80 A1-50 A1-70 Torque Values Stainless Steel Bolt Table Chart. 0000036287 00000 n trailer <<7CDEE1431A394FAEB35CC8345A724211>]/Prev 158298/XRefStm 1336>> startxref 0 %%EOF 2658 0 obj <>stream 0000013678 00000 n This metal to metal contact results in a positive resistance to vibration and loosening. Seems to be two lines of thought on using nylock fasteners..:blink: "Nylock adds a secondary retention to the nut. Nylock nuts fall within a group of nuts called 'lock nuts" Lock nuts come in all types and sizes. I would suggest a nylock nut for something like this because its clean & simple and can still be removed. Nylok® Blue Nylon Torq-Patch® Tuflok® is a self-locking element comprised of nylon permanently bonded onto the threads of a fastener. And if with, how do you correlate the correct torque with … 0000001336 00000 n 0000007555 00000 n Nylock Torque Values . • IFI-100 does not govern lock nuts above 1". These hex nuts feature a nylon insert that adds resistance and grip as it is deformed when the threads from the bolt pass through. When torquing a self-locking nut, the nut should be run down on the threads of the bolt until the nut almost contacts the mating surface. The nut can be accurately located at right angles to the shaft by means of the radial locking pins and can be re-used. μ th = Thread friction coefficient μ h = Under head friction coefficient 1 N = 0.225 lb 1 Nm = 0.738 ft-lb. A193 B7 uses 75% of the yield strength. Torque Table. Here’s an example. Nylon Insert Jam Lock A nylock nut with a reduced height. They are a one piece all metal prevailing torque type hex lock nut having a conical top with chamfered corners. Nyloc Nuts are also known as Prevailing Torque Nuts and Half Nuts are also known as Jam Nuts. Metric Nyloc Nut Torque Chart Source : sc01.alicdn.com. The nut is locked by means of three radial brass locking pins arranged at the same angle as the thread flanks. A nut with a nylon insert to prevent backing off. The following torque values are suggested maximums based upon actual lab testing on clean and dry or near dry fasteners. In stock and ready to ship. Folder. 2.5–5.0 Nm, Fifth Removal Prevailing Off Torque: min. Torque Table The following suggested tightening torques provide an excellent starting point for determining torque requirements. Nuts exposed to high levels of vibration can become loose. 0000030245 00000 n Hexagon locking nuts with a nylon locking ring inserted. Use Prevailing Torque All-Metal Nut chart if using this style of nut. ... but when i lock the nut, the torque wrench clicks at the established torque … Make your own chart. 0000026674 00000 n Localized plastic deformation - Some of the starting threads need to be able to accept the mating part (bolt, say) before the prevailing torque begins. If, however, we take our original torque of 10.5 and add the 2 that the Nylock requires and set our torque wrench to 12.5, our clamp load is 2,511 pounds. Torque … Bolt Torque Chart PDF . Now install nyloc, and tighten until the bolt is the same lenght as with the plain nut, thats as close as you can get with nyloc's. Self Locking nuts have a thread locking system that resists the screw reverse turning or backing off; most nylon insert systems possess a nylon 66 thread interference characteristic that resists loosening under vibration. NYLOC NUT DIMENSIONS - IMPERIAL FULL NUT DIMENSIONS - IMPERIAL - BS1083 1965 HALF NUT DIMENSIONS - IMPERIAL - BS1083 1965 0000001720 00000 n G F = Ratio of yield point. If the torque specification for a hex nut is 10 ft-lb, the Stover nut will not need additional torque to fully deform the threads (same for a Nylock nut). 0000027630 00000 n 0000001560 00000 n GMX Search – quick, clear, accurate. 0000014050 00000 n Remember, you may need to vary these numbers somewhat based on the individual joint or the amount of fastener lubrication. December 1st, 2013 Nylock Nut, Inch UNC STP.stl. Since nylon has great memory characteristics, this locking element can be reused several times. The values shown in the chart are to be used as a mid-range guideline. Once tightened, the nylon insert prevents the nut … Size Recommended Torque; Grade 2 Grade 5 Grade 8 18-8 S/S Bronze Brass; Coarse Fine Coarse Fine Coarse Fine Coarse Fine Coarse Fine Coarse Fine #4*-----5.2-4.8-4.3 Wing A nut with ‘wings’ for hand tightening. April 8th, 2014 Nylock Nut, Inch UNC DWG 2004.zip. zip. 0000009067 00000 n Title: Metric Bolts, Screws & Nuts: Tightening Torques Author: Fastener Mart Created Date: 8/12/2006 10:22:23 PM For A307 Grade A, 75% of 36,000 PSI is utilized. Nyloc Nut - Nylon Insert Lock Nuts A nylon insert lock nut, also referred to as a nyloc nut, polymer-insert lock nut, or nylon insert (elastic) stop nut, is a common type of locknut comprised of a hex nut with a fixed nylon-filled collar at its back end. This was an iPart pulled originally from www.cbliss.com and we broke them apart for our library. 0000053049 00000 n ANSI Hardware Design Guide Design Torque and Force Calculations. The nylon collar insert is placed at the end of the nut, with an inner diameter (ID) slightly smaller than the major diameter of the screw. Cap A nut with a domed top over the end of the fastener. 1.8–2.8 Nm. Torque Values for Stainless Steel and Non-Ferrous Fasteners Bolt Silicon Monel Brass 2024-T4 Size Dry Lubricated Dry Lubricated Bronze Aluminum 2-56 2.5 in-lbs 2.1 in-lbs 2.6 in-lbs 2.2 in-lbs 2.3 in-lbs 2.5 in-lbs 2.0 in-lbs 1.4 in-lbs 2-64 3 2.6 3.2 2.7 2.8 3.1 2.5 1.7 4-40 5.2 4.4 5.5 4.7 4.8 5.3 4.3 2.9 Clamp loads for Grade C lock nuts equal 75% of the bolt proof loads specified for SAE J-429 Grade 8, and ASTM A-354 Grade BD bolts. FASTENER TORQUE CHARTS GUIDE FOR PREVAILING-TORQUE LOCK NUT ASSEMBLY TORQUES (CAD AND WAX, GRADE B, C, AND GRADE G FLANGE NUTS) LOCK NUT STANDARDS FROM IFI-100 REQUIREMENTS Torque-Tension Requirements • Clamp loads for the Grade B lock nuts equal 75% of the bolt proof loads specified for SAE J-429 Grade 5, and ASTM A-449 bolts. Nylok® Blue Nylon Torq-Patch® Tuflok® Prevailing Torque Locking Element. A Nyloc (nylon insert) Nut is a torque prevailing nut which uses a plastic/nylon insert located towards the top of the nut, reducing its inner diameter, which then deforms over the mating thread. 0000009388 00000 n Elastic stop nuts and prevailing torque nuts are of the particular type where some portion of the nut deforms elastically to provide a locking action. Nylok® Torq-Patch® Locknut is a self-locking element comprised of nylon permanently bonded into the threads of a nut. The resistance to loosening forces is created by distortion in the top threads. All transactions with Nylok LLC are subject to Nylok LLC’s terms and conditions. Phone: 1-800-558-2808 • Fax: 1-800-553-8769 • www.imperialsupplies.com A55 FASTENER TORQUE CHARTS Imperial has made a concerted effort to provide accurate information in its catalog and on its web site, however Imperial assumes no responsibility for the accuracy of the information. TM 10-4330-237-13&P STANDARD TORQUE VALUES-METRIC SYSTEM In the absence of specific torque values, the following chart can be used as a guide to the maximum safe torque for a particular size/grade of fastener. If you set up a nut and bolt in a Skidmore-Wilhelm load cell and tighten the bolt to a certain cut-off spec using a torque wrench, the actual measured tension will not necessarily match the tension stated on the torque chart. The amount of torque required to run the nut down (friction drag torque) should be measured and added to the amount of torque specified for the fastener. 0000023845 00000 n Minimum torque if scatter is +23% = 1,602 x 0.77 = 1,234 Nm Torque should be set to 1,602 Nm (mean torque) on the torque wrench The accuracy of the tightening method, as well as the change in friction, needs to be accounted for in order not to over-tighten the fastener. ** Torque values for 1/4" and 5/16" sizes are in inch lb. ** Torque values for 1/4" and 5/16" sizes are in inch lb. Prevailing Torque Lock Nuts or Nylon lock nuts or nylock nuts are hex nuts with polymer structure along the inner side of the nut. Prevailing torque of the lock nut should be determined by testing an actual nut and fastener and that number should be added to the desired torque to arrive at a torque spec. Size Recommended Torque; Grade 2 Grade 5 Grade 8 18-8 S/S Bronze Brass; Coarse Fine Coarse Fine Coarse Fine Coarse Fine Coarse Fine Coarse Fine #4*-----5.2-4.8-4.3 RE: bearing retaining nut torque specifications rmw (Mechanical) 26 Jun 10 16:12. 0000058773 00000 n Nyloc Nuts G304 & G316 Dome (Acorn) Nuts G304 & G316 Wing Nuts G304 & G316 Hex Coupling Nuts G316 Hex Flange Serrated Nuts G304 Hex Slotted Nuts G316. When the Nylok® Torq-Patch® Locknut is engaged, it creates a wedge between the nut and mating part compressing the nylon and creating metal to metal contact opposite the patch. Make your own chart. The rule of thumb is to add the prevailing torque to the torque value when applying torque to a Nylock nut. Cu/C paste = Copper/graphite paste (Molykote® 1000) Oil = WD40 has been used. 0000014498 00000 n While the nut is suitable to be reused multiple times, be wary of the damage caused to the nyloc threads. 0000009298 00000 n 2620 39 Grade 2 calculations only cover fasteners 1⁄4"-3⁄4" in diameter up to 6" long; for longer fasteners the torque is reduced significantly. All other torque values are in foot lb. D = Nominal Diameter F = Clamp Load For J429 Grade 5 and 8, FNL Grade 9, A574, Class 4.6, 8.8, 10.9 and 12.9, the clamp loads are listed at 75% of the proof loads specified by the standard. Title: Metric Bolts, Screws & Nuts: Tightening Torques Author: Fastener Mart Created Date: 8/12/2006 10:22:23 PM November 7th, 2012 Nylock Nut, Inch UNC STP.zip. Jam A hex nut with a reduced height. 0000010534 00000 n 0000016802 00000 n Bolt Nut Recommened Torque Table for SAE Grades. Unbrako hex nuts, nylock nuts, hex weld nuts, coupling nuts & serrated flange nuts - Metric & Inch. Torque Values and Friction Coefficient - All Metal Self Locking Nuts - Where Torque tightening equipment is used, account should be taken of the additional torque required to overcome the resistance of the prevailing torque locking nut. Let's break this down. h�b```g``�����p�#��XX80t�``�s I�!X�����Zo��� >�`ZFG�����Ҁ����!��w�@�����~�f�BI�^֙"�b�����}XǶ�z�C�W���,��d�. Now install nyloc, and tighten until the bolt is the same lenght as with the plain nut, thats as close as you can get with nyloc's. Design Resources | Torque Design Menu Torque-Force Calculator | Torque Conversion Calculator. zip. Torque Specs For Nylock Nuts . Example: bolt and nut are both phosphated; required torque = torque recommended x 0.75. They cannot be used at elevated temperatures. Choose from our selection of prevailing torque locknuts, including nylon-insert locknuts, distorted-thread locknuts, and more. There is no torque difference for fine or coarse threads. The outside diameter of the ring is constrained, so the inside diameter must allow this deformation without overfilling the mating thread, or the ring can be pushed out of the nut. A nyloc nut, also referred to as a nylon-insert lock nut, polymer-insert lock nut, or elastic stop nut... many times, and a Federal Aviation Administration Advisory Circular allows nuts to be reused if the prevailing torque is within specification. Making the chart is that easy! The prevailing torque in prevailing torque locknuts comes from localized plastic deformation to an interference fit with continuous sliding during assembly. Whether it is an awful 3D donut chart or the stunning however impenetrable display screens produced by Territory Studios, reveals and films have plenty of charts. When tightening according to guidelines and with no deviation, this is the pre-stress achieved expressed as % of yield point. 0000061081 00000 n 0000049936 00000 n )Terms and Conditions of Sale - Conditions of Purchase - Service Agreement, Torq-Patch Locknut RoHS / WEEE Compliance, Resistant to lubricants, fuel, hydraulic fluids and most commercial solvents, Can be applied to any size or thread configuration larger than a M6/1/4” nut, Bonds to a broad range of fastener finishes, Complies with or exceeds IFI, DIN and major OEM specifications, Is not affected by high humidity conditions, 180° (standard) or 360° (optional) radial coverage, Torque can be adjusted to meet specific applications, No metal removal to reduce fastener strength or performance, Color: blue/red (special colors available upon request), Temperature Range: -56°C (-70°F) to +121°C (+250°F), NYLOK® TORQ-PATCH® locknut is also referred to as TUFLOK®, First Removal Prevailing Off Torque (without preload): min. These nuts are manufactured strictly as per DIN standard 985,6924 & ISO Standard 7040 depending upon the requirement.TorqBolt manufacture these nylon locking nuts in all stainless steel grades,brass & other exotic material 0000041766 00000 n 0000000016 00000 n That type of locknut can and will tear up the fastener and gall and even seize unless lubricated with something nice . 0000006996 00000 n Nylon insert lock nuts that experience field issues, most often, … 0000045681 00000 n His second discovery was made by plotting the bolt tension vs vibration cycles to create a ‘preload decay chart’. Approximately 90% of the applied torque is employed in overcoming friction, 50% at the bearing face of the nut and 40% between the mating threads. Nylok® Torq-Patch® Locknut is a self-locking element comprised of nylon permanently bonded into the threads of a nut. These nuts can withstand extreme amounts of torque and therefore, can be used in high strength and industrial applications. 2620 0 obj <> endobj xref Line charts make it simpler to find assistance and resistance together with chart patterns. In stock and ready to ship. The same as it was without the nylock. Recommended Bolt Torque Values for Stainless Steel and Nonferrous Fasteners (inch series). Earnest Machine Products line of NE series (sizes 1/4” and larger) and NM series (sizes #2 to #12) nylon insert lock nuts are made to the dimensional requirements of the Industrial Standards Institutes specification IFI 100/107 for top insert style with light series hex. It can therefore be seen that only something in the order of 10% effort is … This metal to metal contact results in a positive resistance to vibration and loosening. 0000056491 00000 n A Nylon Lock Nut is a classic locking Nut with a nylon insert for stiffness & vibration resistant.Also called as Nyloc Nuts, Locking Nuts, Stiff Nuts, Prevailing Torque Nuts. Prevailing Torque Chart. Metric Bolt Torque Chart. The primary is torque. 0000008595 00000 n 0000009182 00000 n If the material is a grade 5 nut as others have suggested then use correct torque for the material." In stock and ready to ship. Nylon Lock Nut Specifications Chart. Standard Prevailing-Torque Metric Hex Nuts Size Data Table Property Classes 5, … Wheel Torque Chart If you are planning on installing a wheel on your vehicle, it is important to be aware of the manufacturer recommended torque settings. Using the proper torque helps ensure that the wheel assembly is securely installed. JJPellin, Is this with or without the use of a tabbed lock washer? 0000009992 00000 n Typically there are the "Nylock" or elastic stop nuts, and the "all-metal" lock nuts. When the Nylok® Torq-Patch® Locknut is engaged, it creates a wedge between the nut and mating part compressing the nylon and creating metal to metal contact opposite the patch. Nylon insert nuts to American specification with all the different types and a dimensional comparison page. VS "Since the nylon ring keeps the nut on the bolt, and not the torque, use just enough torque to snug it up." Metric DIN 980 All Metal Prevailing Torque Type Hex Lock Nuts are also known as Stover Lock Nut, Top Lock Nut, Crimped Lock Nut, Oval Lock Nut. Page 1 of 2 - Tie Rod Nylock Nut Torque - posted in Problems, Questions and Technical: When torquing a nylock nut, is it correct to determine the friction torque required to overcome the self locking feature of the nut and then add that figure to the required torque? 1-Prevailing Torque Type Lock Nuts: All metal prevailing torque type lock nuts achieve their prevailing torque by altering the shape of the nut in some way – most commonly by distorting the threads of the nut which then bites into the mating part when tightened. Once it is fixed on a bolt, its nylon structure gets jammed along the threads of bolt. The AutoCAD download is all … All other torque values are in foot lb. 0000039170 00000 n IFI-100 does not govern lock nuts above 1". 0000027112 00000 n NyLoc Nuts or Nylon Insert Nuts are a type of Lock Nut containing a nylon collar which elastically deforms when a threaded fastener is inserted, causing a frictional locking action, and are very popular. If you want the iPart, you can pull it from the cbliss site. 0000008040 00000 n correct torque can however present problems. These nuts are created to a standard of DIN 6926. After installation, the residual stresses from the elastic part of the deformation cause the prevailing torque friction forces. When nuts are submitted to a laboratory for testing, samples are tested in a room temperature environment, with special external threads, and installed with hand tools or other slow speed tools.