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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 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.
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
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.
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.
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. Torque values for 1/4 and 5/16-in series are in inch-pounds.
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. Torque values calculated from formula T=KDF, where.
