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  1. A307 (125)
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Square Head Bolts

Square Head Bolts

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Square Head Bolts offer a large bearing area for positive gripping with an open or adjustable wrench which means less slippage. Head width or wrench size is measured across the flats. Length is measured from under the head. All have a Class 2A thread fit.

Have a question about our manufactured square head bolts? Contact our team directly by phone or by using our secure online form. We look forward to speaking with you!

Square Head Bolt & Screw Inventory

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  • Diameter
  • Thread
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  1. 1/4-20 X 3/4 A307 GRADE A SQUARE HEAD BOLT PLAIN

    Diameter: 1/4
    Thread: 20
    Length: 3/4

  2. 1/4-20 X 3/4 A307 GRADE A SQUARE HEAD BOLT PLAIN

    Diameter: 1/4
    Thread: 20
    Length: 3/4

  3. 1/4-20 X 1 A307 GRADE A SQUARE HEAD BOLT PLAIN

    Diameter: 1/4
    Thread: 20
    Length: 1

  4. 1/4-20 X 1 1/4 A307 GRADE A SQUARE HEAD BOLT PLAIN

    Diameter: 1/4
    Thread: 20
    Length: 1 1/4

  5. 1/4-20 X 1 1/2 A307 GRADE A SQUARE HEAD BOLT PLAIN

    Diameter: 1/4
    Thread: 20
    Length: 1 1/2

  6. 1/4-20 X 2 A307 GRADE A SQUARE HEAD BOLT PLAIN

    Diameter: 1/4
    Thread: 20
    Length: 2

  7. 1/4-20 X 2 1/2 A307 GRADE A SQUARE HEAD BOLT PLAIN

    Diameter: 1/4
    Thread: 20
    Length: 2 1/2

  8. 1/4-20 X 3 1/2 A307 GRADE A SQUARE HEAD BOLT PLAIN

    Diameter: 1/4
    Thread: 20
    Length: 3 1/2

  9. 1/4-20 X 4 A307 GRADE A SQUARE HEAD BOLT PLAIN

    Diameter: 1/4
    Thread: 20
    Length: 4

  10. 5/16-18 X 5/8 A307 GRADE A SQUARE HEAD BOLT PLAIN

    Diameter: 5/16
    Thread: 18
    Length: 5/8

Items 1 to 10 of 125 total

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