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Material
Zinc plated grade 8 steel yellow
Diameter
US
1/4"
(18)
5/16"
(18)
3/8"
(21)
7/16"
(18)
1/2"
(18)
9/16"
(15)
5/8"
(18)
3/4"
(13)
7/8"
(11)
1"
(12)
1-1/8"
(9)
1-1/4"
(9)
Thread density
Coarse (standard) thread
7
(18)
8
(12)
9
(11)
10
(13)
11
(18)
12
(15)
13
(18)
14
(18)
16
(21)
18
(18)
20
(18)
Length
US
3/8"
(1)
1/2"
(3)
5/8"
(3)
3/4"
(5)
7/8"
(3)
1"
(7)
1-1/4"
(8)
1-1/2"
(8)
1-3/4"
(7)
2"
(10)
2-1/4"
(7)
2-1/2"
(10)
2-3/4"
(5)
3"
(12)
3-1/2"
(12)
4"
(12)
4-1/2"
(11)
5"
(12)
5-1/2"
(9)
6"
(12)
7"
(10)
8"
(9)
10"
(4)
Wrench size
7/16"
(18)
1/2"
(18)
9/16"
(21)
5/8"
(18)
3/4"
(18)
13/16"
(15)
15/16"
(18)
1-1/8"
(13)
1-5/16"
(11)
1-1/2"
(12)
1-11/16"
(9)
1-7/8"
(9)
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Hex bolts
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Hex bolts
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Zinc plated grade 8 steel yellow
Hex bolts, Zinc plated grade 8 steel yellow, Coarse (standard) 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 8 steel yellow, Coarse (standard) thread
Diameter and Thread count
1/4"-20
5/16"-18
3/8"-16
7/16"-14
1/2"-13
9/16"-12
5/8"-11
3/4"-10
7/8"-9
1"-8
1-1/8"-7
1-1/4"-7
See also
Metric hex bolts
A bolt with a six sided head.
