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
2951
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$0.59 each
$31.63 / 100
$280.00 / 1000
2960
Lock washers, Stainless steel 18-8, 5/8"
Split lock washers place tension against a nut after tightening, to help prevent loosening.
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$0.45 each
$15.51 / 50
$137.00 / 500

See also

Metric hex bolt

Metric hex bolts

A bolt with a six sided head.