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Alma Bolt Company & Prime Fasteners 1-800-526-2200

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Hex Nut Specifications, Standard & Heavy Combined

 
Threads Per Inch
Hex Nuts
Heavy Hex Nuts
Bolt Size
USS
ASTM
SAE
Width Across Flats
Width Across Corners
Basic Thickness
Width Across Flats
Width Across Corners
Basic Thickness
1/4
20
n/a
28
7/16
1/2
7/32
1/2
9/16
15/64
5/16
18
24
1/2
9/16
11/64
9/16
5/8
19/64
3/8
16
9/16
41/64
21/64
11/16
49/64
23/64
7/16
14
20
11/16
25/32
3/8
3/4
27/32
27/64
1/2
13
3/4
27/32
7/16
7/8
63/64
31/64
9/16
12
18
7/8
1
31/64
15/16
1 3/64
35/64
5/8
11
15/16
1 1/6
35/64
1 1/16
1 3/16
39/64
3/4
10
16
1 1/8
1 9/32
41/64
1 1/4
1 13/16
47/64
7/8
9
14
1 5/16
1 31/64
3/4
1 7/16
1 5/8
55/64
1
8
1 1/2
1 11/16
55/64
1 5/8
1 27/32
63/64
1 1/8
7
8
12
1 11/16
1 29/32
31/32
1 13/16
2 3/64
1 7/64
1 1/4
1 7/8
2 1/8
1 1/16
2
2 1/4
1 7/32
1 3/8
6
2 1/16
2 5/16
1 11/64
2 1/5
2 15/32
1 1/8
1 1/2
2 1/4
2 17/32
1 9/32
2 3/8
2 43/64
1 15/32
1 5/8
5 1/2
2 7/16
2 3/4
1 25/64
2 1/2
2 7/8
1 19/32
1 3/4
5
2 5/8
3 1/64
1 1/2
2 3/4
3 7/64
1 23/32
1 7/8
2 3/4
3 11/64
1 3/4
2 15/16
3 5/16
1 27/32
2
4 1/2
3
3 7/16
1 23/32
3 1/8
3 17/32
1 31/32
2 1/4
3 3/8
3 57/64
1 59/64
3 1/2
3 15/16
2 13/64
2 1/2
4
3 3/4
4 5/16
2 9/64
3 7/8
4 3/8
2 29/64
2 3/4
4 1/8
4 3/4
2 23/64
4 1/4
4 25/32
2 45/64
3
4 1/2
5 3/16
2 37/64
4 5/8
5 7/32
2 61/64
3 1/4
n/a
5
5 5/8
3 3/16
3 1/2
5 1/4
6 1/16
3 7/16
3 3/4
5 3/4
6 1/2
311/16
4
6 1/8
6 7/8
315/16
4 1/4
6 1/2
7 11/32
4 1/4
4 1/2
6 7/8
7 49/64
4 1/2
4 3/4
7 1/4
8 3/16
4 3/4
5
7 5/8
8 5/8
5
5 1/4
8
9 3/64
5 1/4
5 1/2
8 3/8
9 29/64
5 1/2
5 3/4
8 3/4
9 25/32
5 3/4
6
9 1/8
10 1/2
6
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