- 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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