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