Fasteners


Hex Bolt Dimensions



Basic Product Diameter
Full-Size Body Diameter
Width Across Flats
Width Across Corners
Head Height
Thread Length
Thread Length
Max
Min
Max
Min
Up to 6in
Over 6 in
1/4
.26
.237
7/16
.505
0.484
11/64
0.75
1.00
5/16
.324
.298
1/2
.577
0.552
7/32
0.88
1.13
3/8
.388
.360
9/16
.650
0.62
1/4
1.00
1.25
7/16
.452
.421
5/8
.722
0.687
19/64
1.13
1.38
1/2
.515
.482
3/4
.866
0.826
11/32
1.25
1.50
5/8
.642
.605
15/16
1.083
1.033
27/64
1.50
1.75
3/4
.768
.729
1-1/8
1.299
1.24
1/2
1.75
2.00
7/8
.895
.852
1-5/16
1.516
1.447
37/64
2.00
2.25
1
1.022
.976
1-1/2
1.732
1.653
43/64
2.25
2.50
1-1/8
1.149
1.098
1-11/16
1.949
1.859
3/4
2.50
2.75
1-1/4
1.277
1.223
1-7/8
2.165
2.066
27/32
2.75
3.00
1-3/8
1.404
1.345
2-1/16
2.382
2.273
29/32
3.00
3.25
1-1/2
1.531
1.47
2-1/4
2.598
2.48
1
3.25
3.50
1-3/4
1.785
1.716
2-5/8
3.031
2.893
1-5/32
3.75
4.00
2
2.039
1.964
3
3.464
3.306
1-11/32
4.25
4.50
2-1/4
2.305
2.214
3-3/8
3.897
3.719
1-1/2
4.75
5.00
2-1/2
2.559
2.461
3-3/4
4.33
4.133
1-21/32
5.25
5.5
2-3/4
2.827
2.711
4-1/8
4.763
4.546
1-13/16
5.75
6.00
3
3.081
2.961
4-1/2
5.196
4.959
2
6.25
6.50
3-1/4
3.335
3.21
4-7/8
5.629
5.372
2-3/16
6.75
7.00
3-1/2
3.589
3.461
5-1/4
6.062
5.786
2-5/16
7.25
7.50
3-3/4
3.858
3.726
5-5/8
6.495
6.198
2-1/2
7.75
8.00
4
4.111
3.975
6
6.928
6.612
2-11/16
8.25
8.50


Nut dimension



Nominal Thread. Nut Diameter Nut
Size Pitch Major Minor
Max – min
Thick (Zn)
M6 0,75 6,000 5,378 – 5,188 5,00
M8 1,00 8,000 7,153 – 6,917 6,50
M10 1,25 10,000 8,912 – 8,647 8,00
M12 1,25 12,000 10,912 – 10,647 10,00
M16 1,50 16,000 14,676 – 14,376 13,00
M20 1,50 20,000 18,676 – 18,376 16,00
M24 2,0 24,000 22,210 – 21,835 19,00
M30 2,0 30,000 28,210 – 27,835 24,00
M36 3,0 36,00 33,252 – 32,752 29,00


Washer Dimensions


Nominal Washer Diameter Washer Thickness
Size Internal
max – min
External
max – min
Thick
max – min
Thin
M3 3,4 – 3,2 7,0 – 6,7 0,6 – 0,4 -
M4 4,5 – 4,3 9,0 – 8,7 0,9 – 0,7 -
M5 5,5 – 5,3 10,0 – 9,7 1,1 – 0,9 -
M6 6,7 – 6,4 12,5 – 12,1 1,8 – 1,4 0,9 – 0,7
M8 8,7 – 8,4 17,0 – 16,6 1,8 – 1,4 1,1 – 0,9
M10 10,9 – 10,5 21,0 – 20,5 2,2 – 1,8 1,45 – 1,05
M12 13,4 – 13,0 24,0 – 23,5 2,7 – 2,3 1,8 – 1,4
M16 17,4 – 17,00 30,0 – 29,5 3,3 – 2,7 2,2 – 1,8
M20 21,5 – 21,0 37,0 – 36,2 3,3 – 2,7 2,2 – 1,8
M24 25,5 – 25,0 44,0 – 43,2 4,3 – 3,7 2,7 – 2,3
M30 31,6 – 31,0 56,0 – 55,0 4,3 – 3,7 2,7 – 2,3
M36 37,6 – 37,0 66,0 – 65,0 5,6 – 4,4 3,3 – 2,7

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