Standard Torque Figures For Imperial Fasteners - Perkins 2800 Workshop Manual

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Standard torque figures for imperial fasteners

Thread size
inches
1/4
5/16
3/8
7/16
1/2
9/16
5/8
3/4
7/8
1
1 1/8
1 1/4
1 3/8
1 1/2
Thread size
inches
1/4
5/16
3/8
7/16
1/2
5/8
3/4
7/8
1
1 1/8
1 1/4
1 3/8
1 1/2
20
Imperial nuts and bolts
Standard torque
12 +/- 3 Nm (9 +/- 2 lbf ft)
25 +/- 6 Nm (18 +/- 4 lbf ft)
47 +/- 9 Nm (35 +/- 7 lbf ft)
70 +/- 15 Nm (50 +/- 11 lbf ft)
105 +/- 20 Nm (75 +/- 15 lbf ft)
160 +/- 30 Nm (120 +/- 22 lbf ft)
215 +/- 40 Nm (160 +/- 30 lbf ft)
370 +/- 50 Nm (275 +/- 37 lbf ft)
620 +/- 80 Nm (460 +/- 60 lbf ft)
900 +/- 100 Nm (660 +/- 75 lbf ft)
1300 +/- 150 Nm (960 +/- 110 lbf ft)
1800 +/- 200 Nm (1320 +/- 150 lbf ft)
2400 +/- 300 Nm (1780 +/- 220 lbf ft)
3100 +/- 350 Nm (2280 +/- 260 lbf ft)
Imperial taperlock studs
Standard torque
8 +/- 3 Nm (6 +/- 2 lbf ft)
17 +/- 5 Nm (13 +/- 4 lbf ft)
35 +/- 5 Nm (26 +/- 4 lbf ft)
45 +/- 10 Nm (33 +/- 7 lbf ft)
65 +/- 10 Nm (48 +/- 7 lbf ft)
110 +/- 20 Nm (80 +/- 15 lbf ft)
170 +/- 30 Nm (125 +/- 22 lbf ft)
260 +/- 40 Nm (190 +/- 30 lbf ft)
400 +/- 60 Nm (300 +/- 44 lbf ft)
525 +/- 60 Nm (390 +/- 44 lbf ft)
750 +/- 80 Nm (550 +/- 60 lbf ft)
950 +/- 125 Nm (700 +/- 90 lbf ft)
1200 +/- 150 Nm (880 +/- 110 lbf ft)
Workshop Manual, TSD3450E, Issue 1
2800