Torque Settings - McConnel PA7070T Operator's Manual

TORQUE SETTINGS FOR FASTENERS
The chart below lists the correct tightening torque for fasteners. This chart should be
referred to when tightening or replacing bolts in order to determine the grade of bolt and
the correct torque unless specific torque values are assigned in the text of the manual.
Recommended torque is quoted in Foot-Pounds and Newton-Metres within this manual.
The equation for conversion is 1 Nm. = 0.7376 ft. lbs.
TORQUE VALUES FOR IMPERIAL BOLTS
Head Marking
No Marks
Grade Two
Bolt
Value (Dry)
Dia. ft.lb.
1/4" 5.5
5/16" 11
3/8" 20
7/16" 32
1/2" 50
9/16" 70
5/8" 100
3/4" 175
7/8" 175
1" 270
1-1/8" 375
1-1/4" 530
1-3/8" 700
1-1/2" 930
TORQUE VALUES FOR METRIC BOLTS.
Head Marking
Bolt
Value (Dry)
Dia. ft.lb.
6mm 4.5
8mm 11
10mm 21
12mm 37
14mm 60
16mm 92
18mm 125
20mm 180
22mm 250
24mm 310
27mm 450
30mm 625
Head Marking
Three Lines
Grade Five
Value (Dry)
Nm. ft.lb.
7.5
15.0
27.0
43.0
68.0
95.0 115
135.0 160
240.0 280
240.0 450
360.0 675
510.0 850
720.0 1200
950.0 1550
1250.0 2100
4.8
Head Marking
4.8
Value (Dry)
Nm. ft.lb.
6.1
14.9
28.5
50.2
81.4 110
125.0 175
170.0 250
245.0 350
340.0 475
420.0 600
610.0 875
850.0 1200
Head Marking
Grade Eight
Nm. ft.lb.
9 12.2
18 25.0
33 45.0
52 70.0
80 110.0
155.0
220.0
380.0
610.0
915.0
115.0
1626.0
2100.0
2850.0
8.8
Head Marking
8.8
Nm. ft.lb.
8.5 11.5
20 27.1
40 54.2
70 95.0
150.0
240.0
340.0
475.0
645.0
810.0
1180.0
1626.0
45
NOTE:
The values in
the chart apply
to fasteners as
received from
Six Lines
the supplier,
dry or when
Value (Dry)
lubricated with
Nm.
normal engine
12.5 17.0
oil. They DO
26 35.2
NOT apply if
46 63.0
special
75 100.0
graphited,
115 155.0
molydisulphide
160 220.0
greases, or
225 305.0
other extreme
400 540.0
pressure
650 880.0
lubricants are
975 1325.0
used. This
1350 1830.0
applies to both
1950 2650.0
UNF and UNC
2550 3460.0
coarse threads .
3350 4550.0
10.9
10.9
Value (Dry)
Nm.
12 16.3
30 40.1
60 81.4
105 140.0
165 225.0
255 350.0
350 475.0
500 675.0
675 915.0
850 1150.0
1250 1700.0
1700 2300.0
12.9
Head Marking
12.9
Value (Dry)
ft.lb. Nm.
14.5 20.0
35 47.5
70 95.0
120 160.0
190 260.0
300 400.0
410 550.0
580 790.0
800 1090.0
1000 1350.0
1500 2000.0
2000 2700.0