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HIGHWAY EQUIPMENT COMPANY
51
97373-A
Page Rev. A
STANDARD TORQUES NATIONAL COARSE (NC) CAP SCREWS
CAP SCREW GRADE IDENTIFICATION - MARKINGS ON HEAD
SAE GRADE 2 NO MARKINGS
SAE GRADE 5 THREE MARKS - 120 DEGREES APART
SAE GRADE 8 SIX MARKS - 60 DEGREES APART
USE GRADE 2 TORQUES FOR STAINLESS STEEL FASTENERS AND CARRIAGE BOLTS.
TORQUE - FOOT-POUNDS
CAP SCREW GRADE 2 GRADE 5 GRADE 8
SIZE
DRY LUBE DRY LUBE DRY LUBE
1/4” 5 4 8 6 12 9
5/16” 11 8 17 13 25 18
3/8” 20 15 30 23 45 35
7/16” 30 24 50 35 70 55
1/2” 50 35 75 55 110 80
9/16” 65 50 110 80 150 110
5/8” 90 70 150 110 220 170
3/4” 100 120 260 200 380 280
7/8” 140 110 400 300 600 460
1” 220 160 580 440 900 650