Torque Guide

Recommended Torque Values for B7 Studs (ASTM A193) Based Upon 50% Yield

Note: These are for guideline purposes only. Refer to the manufacturer's specifications or your company's engineering department for applied torque values.

Bolt DiameterHeavy Hex Nut Size (AF)Lubricated with Copper, Graphite or Comparable Lubricant*; Coefficient of Friction = 0.100 (Values in lb-ft)Dry Steel on Steel, No Lubricant, Coefficient of Friction = 0.400 (Values in lb-ft)
3/4"1-1/4"157559
7/8"1-7/16"250893
1"1-5/8"3731,332
1-1/8"1-13/16"5381,994
1-1/4"2"7462,720
1-3/8"2-3/16"1,0003,678
1-1/2"2-3/8"1,3074,837
1-5/8"2-9/16"1,6826,260
1-3/4"2-3/4"2,1097,888
1-7/8"2-15/16"2,6029,775
2"3-1/8"3,16711,942
2-1/8"3-5/16"3,80914,408
2-1/4"3-1/2"4,53117,191
2-3/8"3-11/16"5,33920,310
2-1/2"3-7/8"6,23823,786
2-3/4"4-1/4"7,53328,846
3"4-5/8"9,80337,670
3-1/4"5"12,48848,129
3-1/2"5-3/8"15,62260,365
3-3/4"5-3/4"19,24174,516
4"6-1/8"22,16286,146
4-1/4"6-1/2"23,33790,720
4-1/2"6-7/8"26,332102,513
4-3/4"7-1/4"30,994120,831
5"7-5/8"36,176141,210

*Both nut face and threads should be well lubricated.