Best Square Head Bolts. Reviews June, 2021

Rustic Square Head Lag Screws 1/4 in. x 3 in. (50 screws) Black Oxide by Makers Bolt for Antique and Restoration Woodworking Projects

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Rustic Square Head Lag Screws 1/4 in. x 3 in. (50 screws) Black Oxide by Makers Bolt for Antique and Restoration Woodworking Projects

Current price: 19.05 USD


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Weight: 1.6375 Pounds

  • Requires pre-drilled hole and installs with wrench or 3/8" 8-point socket
  • 50 Screws
  • NOTE: The rustic black oxide finish has a light oil coating for corrosion resistance during transport and storage, just like the lag bolts of 100 years ago.
  • Square head lag bolts are a hard to find antique bolt style
  • Head size: 3/8"

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Small Parts FSC5162SHB Grade A Steel Square Head Bolt, 5/16"-18" Thread Size, 2" Long (Pack of 10)

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Small Parts FSC5162SHB Grade A Steel Square Head Bolt, 5/16

Current price: 9.25 USD


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Height: 0.3125 Inches

Length: 2 Inches

  • Requires pre-drilled hole and installs with wrench or 3/8" 8-point socket
  • 50 Screws
  • NOTE: The rustic black oxide finish has a light oil coating for corrosion resistance during transport and storage, just like the lag bolts of 100 years ago.
  • Square head lag bolts are a hard to find antique bolt style
  • Head size: 3/8"
  • Low-Strength Grade A Steel Square Head Bolt, 5/16"-18" Thread Size, 2" Long (Pack of 10)
  • Length: 2 inch
  • Thread size: 5/16''-18
  • Material: steel

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Small Parts FSC14150SHB Grade A Steel Square Head Bolt, 1/4"-20" Thread Size, 1-1/2" Long (Pack of 50)

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Small Parts FSC14150SHB Grade A Steel Square Head Bolt, 1/4

Current price: 10.69 USD


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Height: 0.3125 Inches

Length: 1.5 Inches

  • Requires pre-drilled hole and installs with wrench or 3/8" 8-point socket
  • 50 Screws
  • NOTE: The rustic black oxide finish has a light oil coating for corrosion resistance during transport and storage, just like the lag bolts of 100 years ago.
  • Square head lag bolts are a hard to find antique bolt style
  • Head size: 3/8"
  • Low-Strength Grade A Steel Square Head Bolt, 5/16"-18" Thread Size, 2" Long (Pack of 10)
  • Length: 2 inch
  • Thread size: 5/16''-18
  • Material: steel
  • Low-Strength Grade A Steel Square Head Bolt, 1/4"-20" Thread Size, 1-1/2" Long (Pack of 50)
  • Length: 1-1/2 inch
  • Thread size: 1/4''-20
  • Material: steel

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(35) Square Head 1/2-13 x 3" Bolts Unplated A307 3/4" Sq

Search only Lexar Industrial brand name
(35) Square Head 1/2-13 x 3

Current price: 29.99 USD


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  • Requires pre-drilled hole and installs with wrench or 3/8" 8-point socket
  • 50 Screws
  • NOTE: The rustic black oxide finish has a light oil coating for corrosion resistance during transport and storage, just like the lag bolts of 100 years ago.
  • Square head lag bolts are a hard to find antique bolt style
  • Head size: 3/8"
  • Low-Strength Grade A Steel Square Head Bolt, 5/16"-18" Thread Size, 2" Long (Pack of 10)
  • Length: 2 inch
  • Thread size: 5/16''-18
  • Material: steel
  • Low-Strength Grade A Steel Square Head Bolt, 1/4"-20" Thread Size, 1-1/2" Long (Pack of 50)
  • Length: 1-1/2 inch
  • Thread size: 1/4''-20
  • Material: steel
  • Finish: Plain
  • Head Type: Square
  • Specification: ASTM A314
  • Length: 3
  • Thread Diameter: 1/2-13

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Hard-to-Find Fastener 014973311971 Square Head Bolts, 5/16-18 x 1, Piece-10

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Hard-to-Find Fastener 014973311971 Square Head Bolts, 5/16-18 x 1, Piece-10

Current price: 15.61 USD


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Height: 1.44 Inches

Length: 2.5 Inches

Width: 1.62 Inches

  • Requires pre-drilled hole and installs with wrench or 3/8" 8-point socket
  • 50 Screws
  • NOTE: The rustic black oxide finish has a light oil coating for corrosion resistance during transport and storage, just like the lag bolts of 100 years ago.
  • Square head lag bolts are a hard to find antique bolt style
  • Head size: 3/8"
  • Low-Strength Grade A Steel Square Head Bolt, 5/16"-18" Thread Size, 2" Long (Pack of 10)
  • Length: 2 inch
  • Thread size: 5/16''-18
  • Material: steel
  • Low-Strength Grade A Steel Square Head Bolt, 1/4"-20" Thread Size, 1-1/2" Long (Pack of 50)
  • Length: 1-1/2 inch
  • Thread size: 1/4''-20
  • Material: steel
  • Finish: Plain
  • Head Type: Square
  • Specification: ASTM A314
  • Length: 3
  • Thread Diameter: 1/2-13
  • Head Style: Square
  • Finish: Zinc
  • Material: Steel
  • Length: 1 inch
  • Diameter: 5/16"

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Small Parts FSC5161SHB Grade A Steel Square Head Bolt, 5/16"-18" Thread Size, 1" Long (Pack of 25)

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Small Parts FSC5161SHB Grade A Steel Square Head Bolt, 5/16

Current price: 10.89 USD


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Height: 0.3125 Inches

Length: 1 Inches

  • Requires pre-drilled hole and installs with wrench or 3/8" 8-point socket
  • 50 Screws
  • NOTE: The rustic black oxide finish has a light oil coating for corrosion resistance during transport and storage, just like the lag bolts of 100 years ago.
  • Square head lag bolts are a hard to find antique bolt style
  • Head size: 3/8"
  • Low-Strength Grade A Steel Square Head Bolt, 5/16"-18" Thread Size, 2" Long (Pack of 10)
  • Length: 2 inch
  • Thread size: 5/16''-18
  • Material: steel
  • Low-Strength Grade A Steel Square Head Bolt, 1/4"-20" Thread Size, 1-1/2" Long (Pack of 50)
  • Length: 1-1/2 inch
  • Thread size: 1/4''-20
  • Material: steel
  • Finish: Plain
  • Head Type: Square
  • Specification: ASTM A314
  • Length: 3
  • Thread Diameter: 1/2-13
  • Head Style: Square
  • Finish: Zinc
  • Material: Steel
  • Length: 1 inch
  • Diameter: 5/16"
  • Low-Strength Grade A Steel Square Head Bolt, 5/16"-18" Thread Size, 1" Long (Pack of 25)
  • Length: 1 inch
  • Thread size: 5/16''-18
  • Material: steel

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Small Parts FSC14114SHB Grade A Steel Square Head Bolt, 1/4"-20" Thread Size, 1-1/4" Long (Pack of 25)

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Small Parts FSC14114SHB Grade A Steel Square Head Bolt, 1/4

Current price: 10.03 USD


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Height: 0.3125 Inches

Length: 1.25 Inches

  • Requires pre-drilled hole and installs with wrench or 3/8" 8-point socket
  • 50 Screws
  • NOTE: The rustic black oxide finish has a light oil coating for corrosion resistance during transport and storage, just like the lag bolts of 100 years ago.
  • Square head lag bolts are a hard to find antique bolt style
  • Head size: 3/8"
  • Low-Strength Grade A Steel Square Head Bolt, 5/16"-18" Thread Size, 2" Long (Pack of 10)
  • Length: 2 inch
  • Thread size: 5/16''-18
  • Material: steel
  • Low-Strength Grade A Steel Square Head Bolt, 1/4"-20" Thread Size, 1-1/2" Long (Pack of 50)
  • Length: 1-1/2 inch
  • Thread size: 1/4''-20
  • Material: steel
  • Finish: Plain
  • Head Type: Square
  • Specification: ASTM A314
  • Length: 3
  • Thread Diameter: 1/2-13
  • Head Style: Square
  • Finish: Zinc
  • Material: Steel
  • Length: 1 inch
  • Diameter: 5/16"
  • Low-Strength Grade A Steel Square Head Bolt, 5/16"-18" Thread Size, 1" Long (Pack of 25)
  • Length: 1 inch
  • Thread size: 5/16''-18
  • Material: steel
  • Low-Strength Grade A Steel Square Head Bolt, 1/4"-20" Thread Size, 1-1/4" Long (Pack of 25)
  • Length: 1-1/4 inch
  • Thread size: 1/4''-20
  • Material: steel

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Small Parts FSC141SHB Grade A Steel Square Head Bolt, 1/4"-20" Thread Size, 1" Long (Pack of 25)

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Small Parts FSC141SHB Grade A Steel Square Head Bolt, 1/4

Current price: 9.53 USD


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Height: 0.3125 Inches

Length: 1 Inches

  • Requires pre-drilled hole and installs with wrench or 3/8" 8-point socket
  • 50 Screws
  • NOTE: The rustic black oxide finish has a light oil coating for corrosion resistance during transport and storage, just like the lag bolts of 100 years ago.
  • Square head lag bolts are a hard to find antique bolt style
  • Head size: 3/8"
  • Low-Strength Grade A Steel Square Head Bolt, 5/16"-18" Thread Size, 2" Long (Pack of 10)
  • Length: 2 inch
  • Thread size: 5/16''-18
  • Material: steel
  • Low-Strength Grade A Steel Square Head Bolt, 1/4"-20" Thread Size, 1-1/2" Long (Pack of 50)
  • Length: 1-1/2 inch
  • Thread size: 1/4''-20
  • Material: steel
  • Finish: Plain
  • Head Type: Square
  • Specification: ASTM A314
  • Length: 3
  • Thread Diameter: 1/2-13
  • Head Style: Square
  • Finish: Zinc
  • Material: Steel
  • Length: 1 inch
  • Diameter: 5/16"
  • Low-Strength Grade A Steel Square Head Bolt, 5/16"-18" Thread Size, 1" Long (Pack of 25)
  • Length: 1 inch
  • Thread size: 5/16''-18
  • Material: steel
  • Low-Strength Grade A Steel Square Head Bolt, 1/4"-20" Thread Size, 1-1/4" Long (Pack of 25)
  • Length: 1-1/4 inch
  • Thread size: 1/4''-20
  • Material: steel
  • Low-Strength Grade A Steel Square Head Bolt, 1/4"-20" Thread Size, 1" Long (Pack of 25)
  • Length: 1 inch
  • Thread size: 1/4''-20
  • Material: steel

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Small Parts FSC502SHB Grade A Steel Square Head Bolt, 1/2"-13" Thread Size, 2" Long (Pack of 10)

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Small Parts FSC502SHB Grade A Steel Square Head Bolt, 1/2

Current price: 10.68 USD


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Height: 0.3125 Inches

Length: 2 Inches

  • Requires pre-drilled hole and installs with wrench or 3/8" 8-point socket
  • 50 Screws
  • NOTE: The rustic black oxide finish has a light oil coating for corrosion resistance during transport and storage, just like the lag bolts of 100 years ago.
  • Square head lag bolts are a hard to find antique bolt style
  • Head size: 3/8"
  • Low-Strength Grade A Steel Square Head Bolt, 5/16"-18" Thread Size, 2" Long (Pack of 10)
  • Length: 2 inch
  • Thread size: 5/16''-18
  • Material: steel
  • Low-Strength Grade A Steel Square Head Bolt, 1/4"-20" Thread Size, 1-1/2" Long (Pack of 50)
  • Length: 1-1/2 inch
  • Thread size: 1/4''-20
  • Material: steel
  • Finish: Plain
  • Head Type: Square
  • Specification: ASTM A314
  • Length: 3
  • Thread Diameter: 1/2-13
  • Head Style: Square
  • Finish: Zinc
  • Material: Steel
  • Length: 1 inch
  • Diameter: 5/16"
  • Low-Strength Grade A Steel Square Head Bolt, 5/16"-18" Thread Size, 1" Long (Pack of 25)
  • Length: 1 inch
  • Thread size: 5/16''-18
  • Material: steel
  • Low-Strength Grade A Steel Square Head Bolt, 1/4"-20" Thread Size, 1-1/4" Long (Pack of 25)
  • Length: 1-1/4 inch
  • Thread size: 1/4''-20
  • Material: steel
  • Low-Strength Grade A Steel Square Head Bolt, 1/4"-20" Thread Size, 1" Long (Pack of 25)
  • Length: 1 inch
  • Thread size: 1/4''-20
  • Material: steel
  • Low-Strength Grade A Steel Square Head Bolt, 1/2"-13" Thread Size, 2" Long (Pack of 10)
  • Length: 2 inch
  • Thread size: 1/2''-13
  • Material: steel

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Small Parts FSC383SHB Grade A Steel Square Head Bolt, 3/8"-16" Thread Size, 3" Long (Pack of 10)

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Small Parts FSC383SHB Grade A Steel Square Head Bolt, 3/8

Current price: 10.08 USD


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Height: 0.3125 Inches

Length: 3 Inches

  • Requires pre-drilled hole and installs with wrench or 3/8" 8-point socket
  • 50 Screws
  • NOTE: The rustic black oxide finish has a light oil coating for corrosion resistance during transport and storage, just like the lag bolts of 100 years ago.
  • Square head lag bolts are a hard to find antique bolt style
  • Head size: 3/8"
  • Low-Strength Grade A Steel Square Head Bolt, 5/16"-18" Thread Size, 2" Long (Pack of 10)
  • Length: 2 inch
  • Thread size: 5/16''-18
  • Material: steel
  • Low-Strength Grade A Steel Square Head Bolt, 1/4"-20" Thread Size, 1-1/2" Long (Pack of 50)
  • Length: 1-1/2 inch
  • Thread size: 1/4''-20
  • Material: steel
  • Finish: Plain
  • Head Type: Square
  • Specification: ASTM A314
  • Length: 3
  • Thread Diameter: 1/2-13
  • Head Style: Square
  • Finish: Zinc
  • Material: Steel
  • Length: 1 inch
  • Diameter: 5/16"
  • Low-Strength Grade A Steel Square Head Bolt, 5/16"-18" Thread Size, 1" Long (Pack of 25)
  • Length: 1 inch
  • Thread size: 5/16''-18
  • Material: steel
  • Low-Strength Grade A Steel Square Head Bolt, 1/4"-20" Thread Size, 1-1/4" Long (Pack of 25)
  • Length: 1-1/4 inch
  • Thread size: 1/4''-20
  • Material: steel
  • Low-Strength Grade A Steel Square Head Bolt, 1/4"-20" Thread Size, 1" Long (Pack of 25)
  • Length: 1 inch
  • Thread size: 1/4''-20
  • Material: steel
  • Low-Strength Grade A Steel Square Head Bolt, 1/2"-13" Thread Size, 2" Long (Pack of 10)
  • Length: 2 inch
  • Thread size: 1/2''-13
  • Material: steel
  • Low-Strength Grade A Steel Square Head Bolt, 3/8"-16" Thread Size, 3" Long (Pack of 10)
  • Length: 3 inch
  • Thread size: 3/8''-16
  • Material: steel

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