Twose TE480 - Fastener Torque Specifications; Imperial Bolt Torque Values; Metric Bolt Torque Values

38
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. = 1.356 ft. lbs.
TORQUE VALUES FOR IMPERIAL BOLTS
Bolt
Dia. ft.lb. Nm. ft.lb. Nm. ft.lb. Nm.
1/4" 5.
5
7.
5
9
12.
2
12.
5
17.0
5/16" 11 15.0 18 25.0 2
6
35.
2
3/8" 20 27.0 33 45.0 4
6
63.0
7/16" 3
2
43.0 5
2
70.0 7
5
100.0
1/2" 50 68.0 80 110.0 11
5
155.0
9/16" 70 95.0 115 155.0 160 220.0
5/8" 100 135.0 160 220.0 22
5
305.0
3/4" 17
5
240.0 280 380.0 400 540.0
7/8" 17
5
240.0 450 610.0 650 880.0
1" 270 360.0 675 915.0 97
5
1325.0
1-1/8" 37
5
510.0 850 115.0 1350 1830.0
1-1/4" 530 720.0 1200 1626.0 1950 2650.0
1-3/8" 700 950.0 1550 2100.0 2550 3460.0
1-1/2" 930 1250.0 2100 2850.0 3350 4550.0
TORQUE VALUES FOR METRIC BOLTS.
Bolt
Dia. ft.lb. Nm. ft.lb. Nm. ft.lb. Nm. ft.lb. Nm.
6mm 4.
5
6.1 8.
5
11.5 1
2
16.3 14.5 20.0
8mm 11 14.
9
20 27.1 30 40.1 35 47.
5
10mm 21 28.5 40 54.
2
60 81.4 70 95.0
12mm 37 50.
2
70 95.0 10
5
140.0 120 160.0
14mm 60 81.4 110 150.0 16
5
225.0 190 260.0
16mm 9
2
125.0 175 240.0 25
5
350.0 300 400.0
18mm 12
5
170.0 250 340.0 350 475.0 410 550.0
20mm 180 245.0 350 475.0 500 675.0 580 790.0
22mm 250 340.0 475 645.0 67
5
915.0 800 1090.0
24mm 310 420.0 600 810.0 850 1150.0 1000 1350.0
27mm 450 610.0 875 1180.0 1250 1700.0 1500 2000.0
30mm 62
5
850.0 1200 1626.0 1700 2300.0 2000 2700.0
Head Marking
12.
9
Value (Dry)Value (Dry) Value (Dry)
Head Marking Head Marking
8.8 10.
9
Head Marking
4.8
Value (Dry)
Value (Dry)Value (Dry)Value (Dry)
Head Marking Head Marking Head Marking
No Marks Three Line
s
Six Lines
Grade Two Grade Five Grade Eight
4.8
10.9
8.8
12.9
NOTE:
The values in
the chart apply
to fasteners as
received from
the supplier,
dry or when
lubricated with
normal engine
oil. They DO
NOT apply if
special
graphited,
molydisulphide
greases, or
other extreme
p
ressure
lubricants are
used. This
applies to both
UNF and UNC
coarse threads
.