These vintage-inspired black oxide nuts are for use with machine bolts and machine screws. Browse below for our selection of square nuts and hex nuts for sale.

Head thickness:

  • 8-32  = 1/8" thick
  • 1/4"   = 0.2"
  • 5/16" = 1/4" thick
  • 3/8"   = 5/16"
  • 1/2"   = 7/16" thick 

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  • Sockets for Square Head Bolts
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    The price depends on the options chosen on the product page

    Starting at $10.00

  • 8-32 Square Nuts
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    $0.15
  • 1/4" Square Nuts
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    $0.25
  • 5/16" Square Nuts
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    $0.20
  • 3/8" Square Nuts
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    $0.25
  • 1/2" Square Nuts
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    $0.75
  • 1/2" -13 Hex Nuts - Zinc
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    $0.10
  • 5/8" Square Nuts
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    $0.50