Perkins 2800 - Standard Torque Figures for Imperial Fasteners

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