Types of Fasteners Dimensions
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 |