1/2"-13 Square Head Machine Bolts

1/2"-13 Square Head Machine Bolts

28 products

In black oxide and plain steel.

  • Material is low carbon steel (Grade 2/A307 equivalent) and *not* structural.
  • Head/Wrench/8-point Socket size is 3/4"
  • Thread length is 1.25" unless otherwise specified
  • Head height is approximately .35"

As of the fall of 2025, the longest size that is readily available is 8". However we can cut and thread the 22-1/2" to the size you need. Please contact us for more info.

28 products
1/2"-13 x 1" Square Head Machine Bolt, Black Oxide
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1/2"-13 x 1-1/4" Square Head Machine Bolt, Plain
1/2"-13 x 1-1/4" Square Head Machine Bolt, Black Oxide
1/2"-13 x 1-1/2" Square Head Machine Bolt, Plain
1/2"-13 x 1-1/2" Square Head Machine Bolt, Black Oxide
1/2"-13 x 1-3/4" Square Head Machine Bolt, Black Oxide
1/2"-13 x 2" Square Head Machine Bolt, Black Oxide
1/2"-13 x 2-1/4" Square Head Machine Bolt, Black Oxide
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1/2"-13 x 2-1/2" Square Head Machine Bolt, Plain
1/2"-13 x 2-1/2" Square Head Machine Bolt, Black Oxide
Sold Out
1/2"-13 x 2-3/4" Square Head Machine Bolt, Plain
1/2"-13 x 2-3/4" Square Head Machine Bolt, Black Oxide
1/2"-13 x 3" Square Head Machine Bolt, Plain
1/2"-13 x 3" Square Head Machine Bolt, Black Oxide
1/2"-13 x 3-1/2" Square Head Machine Bolt, Black Oxide
1/2"-13 x 4" Square Head Machine Bolt, Plain
1/2"-13 x 4" Square Head Machine Bolt, Black Oxide
1/2"-13 x 4-1/2" Square Head Machine Bolt, Black Oxide
1/2"-13 x 5" Square Head Machine Bolt, Black Oxide
1/2"-13 x 5-1/2" Square Head Machine Bolt, Plain
1/2"-13 x 5-1/2" Square Head Machine Bolt, Black Oxide
Sold Out
1/2"-13 x 6" Square Head Machine Bolt, Black Oxide
Sold Out
1/2"-13 x 7" Square Head Machine Bolt, Plain
1/2"-13 x 7" Square Head Machine Bolt, Black Oxide
Sold Out
1/2"-13 x 8" Square Head Machine Bolt, Plain
1/2"-13 x 8" Square Head Machine Bolt, Black Oxide
1/2"-13 X 22-1/2" Sq Hd Machine Bolts, Plain
1/2"-13 X 30" Sq Hd Machine Bolts, Plain
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