Operation and maintenance manual

QSB4.5 and QSB6.7 Capscrew Markings and Torque Values
Section V - Maintenance Specifications Page V-19
Body
Size
Torque Torque Torque
Diamet
er
Cast Iron Aluminium Cast Iron Aluminium Cast Iron Aluminium
mm N•m ft-lb N•m ft-lb N•m ft-lb N•m ft-lb N•m ft-lb N•m ft-lb
8 23 17 18 14 33 25 18 14 40 29 18 14
10 45 33 30 25 65 50 30 25 70 50 30 25
12 80 60 55 40 115 85 55 40 125 95 55 40
14 125 90 90 65 180 133 90 65 195 145 90 65
16 195 140 140 100 280 200 140 100 290 210 140 100
18 280 200 180 135 390 285 180 135 400 290 180 135
20 400 290 — — 550 400 — — — — — —
Capscrew Markings and Torque Values - U.S. Customary
Capscrew
Body Size
Cast Iron Aluminium Cast Iron Aluminium
N•m ft-lb N•m ft-lb N•m ft-lb N•m ft-lb
1/4 - 20 9 7 8 6 15 11 8 6
1/4 - 28 12 9 9 7 18 13 9 7
5/16 - 18 20 15 16 12 30 22 16 12
5/16 - 24 23 17 19 14 33 24 19 14
3/8 - 16 40 30 25 20 55 40 25 20
3/8 - 24 40 30 35 25 60 45 35 25
7/16 - 14 60 45 45 35 90 65 45 35
7/16 - 20 65 50 55 40 95 70 55 40
1/2 - 13 95 70 75 55 130 95 75 55
1/2 - 20 100 75 80 60 150 110 80 60
9/16 - 12 135 100 110 80 190 140 110 80
9/16 - 18 150 110 115 85 210 155 115 85
5/8 - 11 180 135 150 110 255 190 150 110
5/8 - 18 210 155 160 120 290 215 160 120
3/4 - 10 325 240 255 190 460 340 255 190
3/4 - 16 365 270 285 210 515 380 285 210
7/8 - 9 490 360 380 280 745 550 380 280
7/8 - 14 530 390 420 310 825 610 420 310
1 - 8 720 530 570 420 1100 820 570 420
1 - 14 800 590 650 480 1200 890 650 480