Hex bolt

Hex bolts, Zinc plated steel, 5/16" x 5-1/2"

Hex bolt diameter is measured on the outside of the threads.

Hex bolt diameter

Diameter and Thread count

Matching Products

Click on a product # for additional info

Prod. # Description Buy
2977
SAE flat washers, Zinc plated steel, 5/16"
SAE pattern is a tighter fit on the bolt and a smaller outside diameter.
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$0.06 each
$2.18 / 100
$17.80 / 1000
2995
USS flat washers, Zinc plated steel, 5/16"
USS pattern is the most common type of flat washer.
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$0.05 each
$2.50 / 100
$20.00 / 1000
3025
Lock washers, Zinc plated steel, 5/16"
Split lock washers place tension against a nut after tightening, to help prevent loosening.
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$0.06 each
$1.75 / 100
$15.00 / 1000

See also

Metric hex bolt

Metric hex bolts

A bolt with a six sided head.