Service Manual

Torque Specifications
1-54 627333-A
Unified Inch Bolt and Cap Screw Values
Unified Bolt and Cap Screw Values Chart
NOTE: “Lubricared” means coated with a lubricant
such as engine oil, or fasteners with phosphate
and oil coatings. “Dry” means plain or zinc
plated without any lubrication.
NOTE: Grade 2 applies for hex cap screws (not hex
bolts) up to 152 mm (6-inch) long. Grade 1
applies for hexcap screws over over 152 mm
(6-inch) long, and for all other types of bolts
and screws of any length.
FIG. 2
Q000012S
Grade 1 Grade 2 Grade 5, 5.1, or 5.2 Grade 8 or 8.2
Size Lubricated Dry Lubricated Dry Lubricated Dry Lubricated Dry
Nm lb-ft Nm lb-ft Nm lb-ft Nm lb-ft Nm lb-ft Nm lb-ft Nm lb-ft Nm lb-ft
1/4 3.7 2.8 4.7 3.5 6 4.5 7.5 5.5 9.5 7 12 9 13.5 10 17 12.5
5/16 7.7 5.5 10 7 12 9 15 11 20 15 25 18 28 21 35 26
3/814101713221627203526443350366346
7/16 22 16 28 20 35 26 44 32 55 41 70 52 80 58 100 75
1/2332542315339675085631108012090150115
9/16 48 36 60 45 75 56 95 70 125 90 155 115 175 130 225 160
5/8 67 50 85 62 105 78 135 100 170 125 215 160 240 175 300 225
3/4 120 87 150 110 190 140 240 175 300 225 375 280 425 310 550 400
7/8 190 140 240 175 190 140 240 175 490 360 625 450 700 500 875 650
1 290 210 360 270 290 210 360 270 725 540 925 675 1050 750 1300 975
1-1/8 400 300 510 375 400 300 510 375 900 675 1150 850 1450 1075 1850 1350
1-1/4 570 425 725 530 570 425 725 530 1300 950 1650 1200 2050 1500 2600 1950
1-3/8 750 550 950 700 750 550 950 700 1700 1250 2150 1550 2700 2000 3400 2550
1-1/2 1000 725 1250 925 990 725 1250 930 2250 1650 2850 2100 3600 2650 4550 3350