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Material
Zinc plated grade 5 steel
Diameter
US
1/4"
(2)
5/16"
(2)
3/8"
(2)
7/16"
(2)
1/2"
(2)
9/16"
(2)
5/8"
(2)
3/4"
(2)
Thread density
Coarse
10
(1)
11
(1)
12
(1)
13
(1)
14
(1)
16
(2)
18
(3)
20
(3)
Fine
16
(2)
18
(3)
20
(3)
24
(2)
28
(1)
Length
1-1/2"
Wrench size
7/16"
(2)
1/2"
(2)
9/16"
(2)
5/8"
(2)
3/4"
(2)
13/16"
(2)
15/16"
(2)
1-1/8"
(2)
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Zinc
Grade 5
1-1/2"
Hex
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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, 1-1/2"
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
Diameter and Thread count
Coarse (standard) thread
1/4"-20
5/16"-18
3/8"-16
7/16"-14
1/2"-13
9/16"-12
5/8"-11
3/4"-10
Fine thread
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.
