Introduction - Section 1 OM1015.2 12/99 Page 1-10 Standard Charts and Tables Standard Assembly Torques For 12-Point, Grade 9, Capscrews (SAE) Standard Metric Assembly Torque For Class 10.9 Capscrews & Class 10 Nuts The following specifications appy to required assembly torques for all 12-Point, Grade 9 (170,000 psi minimum tensile), Capscrews. The following specifications appy to required assembly torques for all meteric Class 10.9 finished hexagon head capscrews and Class 10 nuts. Capscrew threads and seats SHALL be lubricated when assembled. Capscrews threads and seats SHALL NOT be lubricated when assembled.
These specifications are based on all capscrews, nuts, and hardened washers being phosphate and oil coated. NOTE: If zinc-plated hardware is used, each piece must be lubricated with a Rust Preventive Grease or Lithium-base grease to achieve the same clamping forces provided below . Unless instructions specifically recommend oth- erwise, these standard torque values are to be used with simple lithium base chassis grease (multi-purpose EP NLGI) or a rust- preventive grease (see list, this page) on the threads . Torques are calculated to give a clamping force of approximately 75% of proof load. Torques are calculated to give a clamping force of approximately 75% of proof load.
The maximum torque tolerance shall be ± 10% of the torque value shown. The maximum torque tolerance shall be within ± 10% of the torque value shown. SUGGESTED* SOURCES FOR RUST PREVENTIVE GREASE: AMERICAN ANTI-RUST GREASE # 3-X from Standard Oil Company (also American Oil Co.) GULF NORUST # 3 from Gulf Oil Company. MOBILARMA 355, Product No. 66705 from Mobil Oil Corporation. RUST BAN 326 from Humble Oil Company. RUSTOLENE B GREASE from Sinclair Oil Company. RUST PREVENTIVE GREASE - CODE 312 from the Southwest Grease and Oil Company. * NOTE: This list represents the current Engineering approved sources for use in KMS, Peoria Operations, manufacture. It is not exclusive.
Other products may meet the same specifications of this list . TABLE II - STANDARD ASSEMBLY TORQUE for 12-Point, Grade 9, Capscrews CAPSCREW SIZE* TORQUE ft. lbs. TORQUE N.m TORQUE kg.m 0.250 - 20 12 16 1.7 0.312 - 18 24 33 3.3 0.375 - 16 42 57 5.8 0.438 - 14 70 95 9.7 0.500 - 13 105 142 14.5 0.562 - 12 150 203 20.7 0.625 - 11 205 278 28.3 0.750 - 10 360 488 49.7 0.875 - 9 575 780 79.4 1.000 - 8 860 1166 119 1.000 - 12 915 1240 126 1.125 - 7 1230 1670 170 1.125 - 12 1330 1800 184 1.250 - 7 1715 2325 237 1.250 - 12 1840 2495 254 1.375 - 6 2270 3080 313 1.375 - 12 2475 3355 342 1.500 - 6 2980 4040 411 1.500 - 12 3225 4375 445 * Shank Diameter (in.) - Threads per in.
This Table represents standard values only. Do not use these values to replace torque values which are specified in assembly instructions. TABLE III - STANDARD METRIC ASSEMBLY TORQUE CAPSCREW SIZE* TORQUE N.m TORQUE ft. lbs. TORQUE kg.m M 6 x 1 12 9 1.22 M 8 x 1.25 30 22 3.06 M10 x 1.5 55 40 5.61 M12 x 1.75 95 70 9.69 M14 x 2 155 114 15.81 M16 x 2 240 177 24.48 M20 x2.5 465 343 47.43 M24 x 3 800 590 81.6 M30 x 3.5 1600 1180 163.2 M36 x 4 2750 2028 280.5 * Shank Diameter (mm) x Threads per mm. This Table represents standard values only. Do not use these values to replace torque values which are specified in assembly instructions.