- 21 -
min.
max.
min.
max.
min.
max.
min.
max.
min.
max.
min.
max.
M6
UNC
1.00
3.6
5.8
4.9
7.9
5.8
9.4
7.9
12.7
7.2
10
9.8
13.6
M8
UNC
1.25
7.2
14
9.8
19
17
22
23
29.8
20
26
27.1
35.2
M10
UNC
1.5
20
25
27.1
33.9
34
40
46.1
54.2
38
46
51.5
62.3
M12
UNC
1.75
28
34
37.9
46.1
51
59
69.1
79.9
57
66
77.2
89.4
M14
UNC
2.0
49
56
66.4
75.9
81
93
109.8
126
96
109
130.1
147.7
M16
UNC
2.0
67
77
90.8
104.3
116
130
157.2
176.2
129
145
174.8
196.5
M18
UNC
2.0
88
100
119.2
136
150
168
203.3
227.6
175
194
237.1
262.9
M20
UNC
2.5
108
130
146.3
176.2
186
205
252
277.8
213
249
288.6
337.4
M8
UNF
1.0
12
17
16.3
23
19
27
25.7
36.6
22
31
29.8
42
M10
UNF
1.25
20
29
27.1
39.3
35
47
47.4
63.7
40
52
54.2
70.5
M12
UNF
1.25
31
41
42
55.6
56
68
75.9
92.1
62
75
84
101.6
M14
UNF
1.5
52
64
70.5
86.7
90
106
122
143.6
107
124
145
168
M16
UNF
1.5
69
83
93.5
112.5
120
138
162.6
187
140
158
189.7
214.1
M18
UNF
1.5
100
117
136
158.5
177
199
239.8
269.6
202
231
273.7
313
M20
UNF
1.5
132
150
178.9
203.3
206
242
279.1
327.9
246
289
333.3
391.6
Inches
mm
min.
max.
min.
max.
min.
max.
min.
max.
min.
max.
min.
max.
1/4
6.35
5
6
6.8
8.13
9
11
12.2
14.9
12
15
16.3
30.3
5/16
7.94
10
12
13.6
16.3
17
20.5
23.1
27.8
24
29
32.5
39.3
3/8
9.53
20
23
27.1
31.2
35
42
47.5
57.0
45
54
61.0
73.2
7/16
11.11
30
35
40.7
47.4
54
64
73.2
86.8
70
84
94.9
113.9
1/2
12.70
45
52
61.0
70.5
80
96
108.5
130.2
110
132
149.2
179.0
9/16
14.29
65
75
88.1
101.6
110
132
149.2
179.0
160
192
217.0
260.4
5/8
15.88
95
105
128.7
142.3
150
180
203.4
244.1
220
264
298.3
358.0
3/4
19.05
150
185
203.3
250.7
270
324
366.1
439.3
380
456
515.3
618.3
7/8
22.23
160
200
216.8
271.0
400
480
542.4
650.9
600
720
813.6
976.3
1
25.40
250
300
338.8
406.5
580
696
786.5
943.8
900
1080
1220.4
1464.5
1 1/8
25.58
-
-
-
-
800
880
1084.8
1193.3
1280
1440
1735.7
1952.6
1 1/4
31.75
-
-
-
-
1120
1240
1518.7
1681.4
1820
2000
2467.9
2712.0
1 3/8
34.93
-
-
-
-
1460
1680
1979.8
2278.1
2380
2720
3227.3
3688.3
1 1/2
38.10
-
-
-
-
1940
2200
2630.6
2983.2
3160
3560
4285.0
4827.4
TORQUE CHART
TORQUE SPECIFICATION TABLE
Thread UNC and UNF
Use the above torques when special torque is not given.
NOTE: These values apply to fasteners as received from supplier, dry, or when lubricated with normal engine oil. They do
not apply if extreme pressure lubricants are used.
Pound feet
Newton meters
Pound feet
Newton meters
Pound feet
Newton meters
* Thick nuts must be used with grade 8 bolts.
Bolt size
Torque
Torque
Torque
Torque
Torque
Pound feet
Newton meters
Pound feet
Newton meters
Pound feet
Newton meters
Size of
screw
Pitch (mm)
Torque
Grade 7T
Grade 8T
Grade 4T
Grade 2
Grade 5
Grade 8*
Thread
