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
SAE flat washers, Chrome plated steel, 5/8"
SAE pattern is a tighter fit on the bolt and a smaller outside diameter.
This product is

Unfortunately this product is not currently available for purchase due to limited supply or other problems.

For more details about availability, as well as recommended substitutions, feel free to contact our customer service at 866-337-9888, info@boltdepot.com, or web chat (see link at top of page).

temporarily unavailable .
Lock washers, Chrome plated steel, 5/8"
Split lock washers place tension against a nut after tightening, to help prevent loosening.
$3.87 / ea
$30.92 / 10
$138.00 / 50

See also

Metric hex bolt

Metric hex bolts

A bolt with a six sided head.