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Tightening Torque. K = 0.15 K = 0.17 K = 0.20. TORQUE-TENSION REFERENCE GUIDE. #1 #2 #3 #4 #5 #6 #8 #10 1/4 5/16 3/8 7/16 1/2 5/8 3/4 7/8 0.0730 0.0860 0.0990 0.1120 0.1250 0.1380 0.1640 0.1900 0.2500 0.3125 0.3750 0.4375 0.5000 0.6250 0.7500 0.8750 1.0000 1.2500 1.5000. 64. 56. 48. 40. 32. 24. 20. 18. 16. 14. 13. 11. 10. 3.0 in-lbs. 3.4 in-lbs.
Bolt Size TPI Proof Load (lbs) 1 Clamp Load (lbs) 2 Tightening Torque (ft lbs) Galv+Waxed Galv Plain; 1 ⁄ 4: 20: 1,053: 790: 2: 4: 3: 5 ⁄ 16: 18: 1,735: 1,302: 3: 8: 7: 3 ⁄ 8: 16: 2,567: 1,925: 6: 15: 12: 7 ⁄ 16: 14: 3,521: 2,640: 10: 24: 19: 1 ⁄ 2: 13: 4,700: 3,525: 15: 37: 29: 9 ⁄ 16: 12: 6,028: 4,521: 21: 53: 42: 5 ⁄ 8: 11: 7 ...
Phone. : 1-800-558-2808. imperialsupplies.com. FASTENER TORQUE CHARTS. Fax. : 1-800-553-8769. 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. Imperial has made a concerted effort to provide accurate information in ...
Maximum Tightening Torques for US Imperial Bolts. This table shows values for threads that have been lightly oiled and the tension is 70% of yield strength. For dry bolts, the values should be increased by 30%. Size (in) Recommended Maximum Tightening Torque (lb-ft) SAE Grade 2. SAE Grade 5. SAE Grade 8.
Bolt Torque Charts for Grades 2, 5, and 8. Bolts must be tightened using the correct torque. Properly torqued bolts will provide the maximum amount of clamping force under load. Under torqued bolts can quickly come loose, and over-torqued bolts are liable to break. The charts below show the ideal tightening torque for each bolt grade for a ...
Remember, you may need to vary these numbers somewhat based on the individual joint or the amount of fastener lubrication. This table is offered as the suggested maximum torque values for threaded products and is only a guide. Torque Values = inch-lbs. Bolt Size. 18-8 Stainless Steel.
Bolt Torque Chart showing suggested torque values and corresponding bolt clamping forces for various sizes and specifications of fasteners.
