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Material
Zinc plated grade 5 steel
Diameter
US
1/4"
(17)
5/16"
(18)
3/8"
(17)
7/16"
(17)
1/2"
(17)
9/16"
(12)
5/8"
(17)
3/4"
(14)
Thread density
Fine thread
16
(14)
18
(29)
20
(34)
24
(35)
28
(17)
Length
US
1/2"
(3)
5/8"
(3)
3/4"
(5)
1"
(7)
1-1/4"
(7)
1-1/2"
(8)
1-3/4"
(6)
2"
(8)
2-1/4"
(7)
2-1/2"
(8)
2-3/4"
(1)
3"
(8)
3-1/2"
(8)
4"
(8)
4-1/2"
(8)
5"
(8)
5-1/2"
(8)
6"
(8)
6-1/2"
(2)
7"
(4)
8"
(4)
Wrench size
7/16"
(17)
1/2"
(18)
9/16"
(17)
5/8"
(17)
3/4"
(17)
13/16"
(12)
15/16"
(17)
1-1/8"
(14)
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Hex bolts
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Hex bolts
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Zinc plated grade 5 steel
Hex bolts, Zinc plated grade 5 steel, Fine thread
Hex bolt diameter is measured on the outside of the threads.
Resources
US Hex bolt sizes
(opens in new window/tab)
Head/Wrench size table
US thread per inch table
Hex bolts, Zinc plated grade 5 steel, Fine thread
Diameter and Thread count
1/4"-28
5/16"-24
3/8"-24
7/16"-20
1/2"-20
9/16"-18
5/8"-18
3/4"-16
See also
Metric hex bolts
A bolt with a six sided head.
