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Free shipping on orders $250 and up!

Square Head Bolts

  • 5/16"-18 x 1-3/8" Zinc Plated Grade 2 / A307 Steel Coarse Thread Square Head Bolts
    $10.38 - $12.39
    $10.38 - $12.39
    $10.38 - $12.39
    $10.38

    5/16"-18 x 1-3/8" Zinc Plated Grade 2 / A307 Steel Coarse Thread Square Head Bolts

    Monster Fastener
    10+ in stock

    Diameter: 5/16"Length: 1-3/8"Material: SteelFinish: ZincHead Style: Square (1/2" Wrench)Thread Size: 18 (Coarse)Hardness: Grade 2 / A307Type: Squar...

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    $10.38 - $12.39
    $10.38 - $12.39
    $10.38 - $12.39
    $10.38
  • 5/16"-18 x 1-3/8" Zinc Plated Grade 2 / A307 Steel Coarse Thread Square Head Bolts
    $9.40 - $9.40
    $9.40
    $9.40 - $9.40
    $9.40

    5/16"-18 x 1-3/8" Zinc Grade 2 / A307 Square Head Bolts (10 pcs.)

    Monster Fastener
    10+ in stock

    Diameter: 5/16"Length: 1-3/8"Material: SteelFinish: ZincHead Style: Square (1/2" Wrench)Thread Size: 18 (Coarse)Hardness: Grade 2 / A307Type: Squar...

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    $9.40 - $9.40
    $9.40
    $9.40 - $9.40
    $9.40
  • 5/16-18 x 1-3/8 Zinc Plated Steel Coarse Thread Battery Bolt
    $20.21 - $20.21
    $20.21
    $20.21 - $20.21
    $20.21

    5/16-18 x 1-3/8 Zinc Plated Steel Coarse Thread Battery Bolt (50 pcs.)

    Monster Fastener
    10+ in stock

    Diameter: 5/16"Length: 1-3/8"Material: SteelFinish: ZincHead Style: Square (1/2" Wrench)Thread Size: 18 (Coarse)Hardness: Grade 2 / A307Type: Squar...

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    $20.21 - $20.21
    $20.21
    $20.21 - $20.21
    $20.21