Diameter Hex Head Cap Screws Meet ANSI B18.2.1 Dimensional Specifications

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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. The diameter hex head cap screws are reliable fasteners for both construction and machinery parts.

The hex head cap screws feature rolled threads. The hex head cap screws measuring 1/4–1 1/2 in. meet SAE J429 standards for both material and physical properties, while the hex head cap screws measuring 1 3/4–2 in. (equivalent to Grade 8) meet ASTM A354 Grade BD standards for both material and physical properties.

The Plain PN-5598 Hex Head Cap Screw, in particular, has the following specifications.

  • Thread size: 1/4-20
  • Length: 1 3/8 in.
  • Thread length: 3/4 in. 
  • Weight/C: 2.26 lbs
  • Grade 8
  • Plain finish
  • Coarse thread

Other materials and finishes are available. For further information, call or send an information request.