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     Torque Guideline

 Conversion Factors

 in.lbs. * .0835 = ft.lbs.

 ft.lbs. * 12.000 = in.lbs.

N.m * 8.8440 = in.lbs.

 in.lbs. * .1130 = N.m.

 ft.lbs * 1.3560 = N.m.

 N.m. * .7370 = ft.lbs.

Values in chart are given in inch pounds.

 Screw Size

 A
Std. brass nuts & bolts 60000 psi

 B
Grade 1 1010 Steel

 C
Stainless Steel

 D
Grade 2 Nuts & Bolts

 E
Allenoy Flat Head

 F
Grade 5 Nuts & Bolts

 G
Allenoy Socket Head

 H
Grade 8 Cap Screws 150000 psi
 2-56 1-3/4 3.8 2.6 2.2     7.0  
3-48 2-1/2 5.0 4.0 3.5     10.0  
4-40 3-1/4 7.5 5.5 4.7 7.0   14.0  
5-40 5 10.0 8.1 6.9 13.0   20.0  
6-32 6.25 12.0 12.0 8.7 13.0   25.0  
8-32 13.0 21.0 27.0 17.8 23.0   40.0  
10-24 16 26.0 40.0 20.8 55.0   65.0  
1/4-20 56.0 60.0 65.0 76.8 108.0 130.0 160.0 144.0
5/16-18 98.0 147.0 125.0 170.0 175.0 266.0 300.0 300.0
3/8-16 175.0 229.0 200.0 305.0 270.0 470.0 550.0 600.0
7/16-14 280.0 390.0 396.0 491.0 400.0 766.0 950.0 1020.0
1/2-13 385.0 598.0 450.0 749.0 980.0 1156.0 1375.0 1500.0
9/16-12 564.0 845.0 708.0 1100.0 1200.0 1770.0 2000.0 2100.0
5/8-11 912.0  1152.0  1164.0 1410.0 1360.0 2388.0 2800.0 2940.0
3/4-10 1224.0 2118.0 1560.0 2502.0   4092.0 4900.0 5100.0
7/8-9 1896.0 3408.0 2424.0 3000.0   6030.0 7000.0 7920.0
1-8 2544.0 5112.0 3252.0 3600.0   9072.0 10000.0 11880.0