Nominal size and
Thread
Dia.

Pitch of
Thread
(coarse)
pitch
series)

Thread
runout

Diameter of
unthreaded
shank

Width
across
flats

Width
across
corners

Diameter
of
Washer face

Depth
of
Washer
face

Radius
under
head

Height
of
head

max.

max.

min.

max.

min.

max.

min.

max.

min.

max.

min.

max.

min.

0.35
0.40
0.45
0.50
0.70
0.80
1
1.25
1.5
1.75
2
2
2.5
2.5
2.5
3
3
3.5
3.5
4

0.8
1.0
1.0
1.2
1.6
2.0
2.5
3.0
3.5
4.0
5.0
5.0
6.0
6.0
6.0
7.0
7.0
8.0
8.0
10.0

1.6
2.0
2.5
3.0
4.0
5.0
6.0
8.0
10.0
12.0
14.0
16.0
18.0
20.0
22.0
24.0
27.0
30.0
33.0
36.0

1.46
1.86
2.36
2.86
3.82
4.82
5.82
7.78
9.78
11.73
13.73
15.73
17.73
19.67
21.67
23.67
26.67
29.67
32.61
35.61

3.2
4.0
5.0
5.5
7.0
8.0
10.0
13.0
17.0
19.0
22.0
24.0
27.0
30.0
32.0
36.0
41.0
46.0
50.0
55.0

3.08
3.88
4.88
5.38
6.85
7.85
9.78
12.73
16.73
18.67
21.67
23.67
26.67
29.67
31.61
35.38
40.38
45.38
49.38
54.26

3.7
4.6
5.8
6.4
8.1
9.2
11.5
15.0
19.6
21.9
25.4
27.7
31.2
34.6
36.9
41.6
47.3
53.1
57.7
63.5

3.48
4.38
5.51
6.08
7.74
8.87
11.05
14.38
18.90
21.10
24.49
26.75
30.14
33.53
35.72
39.98
45.63
51.28
55.80
61.31

-
-
-
5.08
6.55
7.55
9.48
12.43
16.43
18.37
21.37
23.27
26.27
29.27
31.21
34.98
39.98
44.98
48.98
53.86

-
-
-
4.83
6.30
7.30
9.23
12.18
16.18
18.12
21.12
23.02
26.02
28.80
30.74
34.51
39.36
44.36
48.36
53.24

-
-
-
0.1
0.1
0.2
0.3
0.4
0.4
0.4
0.4
0.4
0.4
0.4
0.4
0.5
0.5
0.5
0.5
0.5

0.2
0.3
0.3
0.3
0.35
0.35
0.4
0.6
0.6
1.1
1.1
1.1
1.1
1.2
1.2
1.2
1.7
1.7
1.7
1.7

0.1
0.1
0.1
0.1
0.2
0.2
0.25
0.4
0.4
0.6
0.6
0.6
0.6
0.8
0.8
0.8
1.0
1.0
1.0
1.0

1.225
1.525
1.825
2.125
2.925
3.650
4.15
5.65
7.18
8.18
9.18
10.18
12.215
13.215
14.215
15.215
17.215
19.26
21.26
23.26

0.975
1.275
1.575
1.875
2.675
3.350
3.85
5.35
6.82
7.82
8.82
9.82
11.785
12.785
13.785
14.785
16.785
18.74
20.74
22.74