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US Fasteners
Wood screws
Sheet metal screws
Hex bolts
Hex bolts
Stainless steel 18-8
1/4"-20
5/16"-18
3/8"-16
7/16"-14
1/2"-13
5/8"-11
3/4"-10
7/8"-9
1"-8
1/4"-28
5/16"-24
3/8"-24
7/16"-20
1/2"-20
Zinc plated grade 2 steel
Zinc plated grade 5 steel
Zinc plated grade 8 steel yellow
Grade 8 steel plain finish
Chrome plated grade 5 steel
Hot dipped galvanized steel
Tap bolts
Machine screws
Carriage bolts & Timber bolts
Lag bolts
Socket products
Set screws
Nuts
Washers
Anchoring products
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Sex bolts & Mating screws
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Elevator bolts
Blind rivets
US assortments
Metric Fasteners
Metric hex bolts
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Metric socket products
Metric set screws
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Metric chrome bolt covers & Hole plugs
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Metric assortments
Associated Products
Apparel
Empty assortment bins & Accessories
Setting tools
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Product Catalog
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Hex bolts
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Hex bolts
Stainless steel 18-8
Resources
US Hex bolt diameters
US thread per inch table
Head/Wrench size
Hex bolt diameter is measured on the outside of the threads.
Diameter and Thread count
Coarse (standard) thread
1/4"-20
5/16"-18
3/8"-16
7/16"-14
1/2"-13
5/8"-11
3/4"-10
7/8"-9
1"-8
Fine thread
1/4"-28
5/16"-24
3/8"-24
7/16"-20
1/2"-20
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