• Hex Head Cap Screw
  • National Bolt & Nut offers a series of 1/4 - 5/8 inch diameter hex head cap screws that meet ANSI B18.2.1 dimensional specifications. Our 1/4 - 5/8 inch diameter hex head cap screws are reliable fasteners for both construction and machinery parts.
  • All our premium 1/4 - 5/8 inch diameter hex head cap screws feature rolled threads. Our hex head cap screws measuring 1/4 - 1 1/2 inches meet SAE J429 standards for both material and physical properties, while our hex head cap screws measuring 1 3/4 - 2 inches (equivalent to Grade 8) meet ASTM A354 Grade BD standards for both material and physical properties.
  • Other materials and finishes available. For further information, call or send an information request.
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Item #

Thread Size

Length

Thread Length

Grade/Class

Finish

Thread Style

N/A 5/16-18 N/A 4 1/4 in N/A 7/8 in N/A Grade 8 N/A Plain N/A Coarse Thread
N/A 5/16-18 N/A 4 1/2 in N/A 7/8 in N/A Grade 8 N/A Plain N/A Coarse Thread
N/A 5/16-18 N/A 5 in N/A 7/8 in N/A Grade 8 N/A Plain N/A Coarse Thread
N/A 5/16-18 N/A 5 1/2 in N/A 7/8 in N/A Grade 8 N/A Plain N/A Coarse Thread
N/A 5/16-18 N/A 6 in N/A 1 1/8 in N/A Grade 8 N/A Plain N/A Coarse Thread
N/A 5/16-18 N/A 6 1/2 in N/A 1 1/8 in N/A Grade 8 N/A Plain N/A Coarse Thread
N/A 5/16-18 N/A 7 in N/A 1 1/8 in N/A Grade 8 N/A Plain N/A Coarse Thread
N/A 5/16-18 N/A 7 1/2 in N/A 1 1/8 in N/A Grade 8 N/A Plain N/A Coarse Thread
N/A 5/16-18 N/A 8 in N/A 1 1/8 in N/A Grade 8 N/A Plain N/A Coarse Thread
N/A 5/16-18 N/A 1/2 in N/A 7/8 in N/A Grade 8 N/A Zinc/Yellow N/A Coarse Thread
N/A 5/16-18 N/A 5/8 in N/A 7/8 in N/A Grade 8 N/A Zinc/Yellow N/A Coarse Thread
N/A 5/16-18 N/A 3/4 in N/A 7/8 in N/A Grade 8 N/A Zinc/Yellow N/A Coarse Thread
N/A 5/16-18 N/A 7/8 in N/A 7/8 in N/A Grade 8 N/A Zinc/Yellow N/A Coarse Thread
N/A 5/16-18 N/A 1 in N/A 7/8 in N/A Grade 8 N/A Zinc/Yellow N/A Coarse Thread
N/A 5/16-18 N/A 1 1/4 in N/A 7/8 in N/A Grade 8 N/A Zinc/Yellow N/A Coarse Thread
N/A 5/16-18 N/A 1 1/2 in N/A 7/8 in N/A Grade 8 N/A Zinc/Yellow N/A Coarse Thread
N/A 5/16-18 N/A 1 3/4 in N/A 7/8 in N/A Grade 8 N/A Zinc/Yellow N/A Coarse Thread
N/A 5/16-18 N/A 2 in N/A 7/8 in N/A Grade 8 N/A Zinc/Yellow N/A Coarse Thread
N/A 5/16-18 N/A 2 1/4 in N/A 7/8 in N/A Grade 8 N/A Zinc/Yellow N/A Coarse Thread
N/A 5/16-18 N/A 2 1/2 in N/A 7/8 in N/A Grade 8 N/A Zinc/Yellow N/A Coarse Thread
N/A 5/16-18 N/A 2 3/4 in N/A 7/8 in N/A Grade 8 N/A Zinc/Yellow N/A Coarse Thread
N/A 5/16-18 N/A 3 in N/A 7/8 in N/A Grade 8 N/A Zinc/Yellow N/A Coarse Thread
N/A 5/16-18 N/A 3 1/4 in N/A 7/8 in N/A Grade 8 N/A Zinc/Yellow N/A Coarse Thread
N/A 5/16-18 N/A 3 1/2 in N/A 7/8 in N/A Grade 8 N/A Zinc/Yellow N/A Coarse Thread
N/A 5/16-18 N/A 3 3/4 in N/A 7/8 in N/A Grade 8 N/A Zinc/Yellow N/A Coarse Thread
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