Screw torque requirement table
Screw
Screw
size
M2*0.4
Machine
M2.5*0.45
Machine
M3*0.5
Machine
M3.5*0.6
Machine
Machine
M4*0.7
M5*0.8
Machine
M6*1.0
Machine
M6*1.0
Hex cap
M8*1.25
Machine
M8*1.25
Hex cap
Hex cap
M10*1.5
M12*1.75
Hex cap
Steel
type
Inch-Lbs
3~4.77
3~4.77
5.5~9
8.5~13
13~18
25~34
45·55
85~112
106~141
205~274
212~382
372~668
Screw in metric
Steel
kgf-cm
3.5~5.5
0.34~0.54
3.5~5.5
0.34~0.54
6.5~10.5
0.64~1.04
10~15
0.98~1.47
15~21
1.47~2.06
29~39
2.84~3.82
52~63.5
5.1~6.22
98~129
9.6~12.65
122~163
11.96~15.98
237~316
23.24~30.98
245~440
24.02~43.15
430~770
42.17~75.49
Steel
Aluminum
N-m
kgf-cm
3~4.5
3~4.5
5.2~8.4
8~12
12~17
23~32
42~51
78~103
98~130
190~253
196~351
343~615
43
Aluminum
N-m
0.34~0.44
0.34~0.44
0.51~0.82
0.78~1.18
1.18~1.66
2.26~3.14
4.11~5
7.65~10.1
9.61~12.75
18.63~24.8
19.22~34.42
33.63~60.3