Search results
Results from the WOW.Com Content Network
Use Prevailing Torque All-Metal Nut chart if using this style of nut. = Nominal Diameter. = 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. For A307 Grade A, 75% of 36,000 PSI is utilized.
Torque Table. The following suggested tightening torques provide an excellent starting point for determining torque requirements. Remember, you may need to vary these numbers somewhat based on the individual joint or the amount of fastener lubrication.
Use SAE 2, 5 or 8 values when grade is known, with a nut of sufficient strength. There is no difference in the above chart between the torque figures for fine or coarse threads. The torque figures
TORQUE ASTM A354-BD / SAE GRADE 8. Download PDF. Show entries. Bolt Size. TPI. Proof Load (lbs) Clamp Load (lbs) Tightening Torque (ft lbs) Lubricated.
The torque values can only be achieved if nut (or tapped hole) has a proof load greater than or equal to the bolt's minimum ultimate tensile strength. Clamp load calculated as 75% of the proof load when specified by the standard. ASTM A307 utilized 75% of 36,000 PSI.
Due to many variables that affect the torque-tension relationship like human error, surface texture, and lubrication the only way to determine the correct torque is through experimentation under actual joint and assembly conditions.
The torque value to use in an application is best obtained by using a calibrated torque wrench (or transducer) and a Skidmore-Wilhelm type load indicating device to equate actual torque to desired tension.
U.S. Recommended Bolt Torque Table. ** Fine thread figures are for 1-14. Grade 2, 5, and 8 values are for plated bolts.
5/16-in diameter are in inch-pounds; diameters 3/8-in and larger are in foot-lbs. Torque values for metric fasteners up through and including M8 are in inch-pounds; diameters M10 and larger are in foot-lbs.
Torque Chart for Stainless Steel Cap Screws. 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.