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Westfield Fasteners Ltd Telephone: 01844201133, Email: enquiries@westfieldfasteners.co.uk
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UNF Bolts

Our range of UNF Bolts are listed below. A full range of American (Imperial) specification stainless steel/hardened steel variants in A2 (304), A4 (316) grades and Zinc Plated hardened steel. Available in UNF and UNC forms. Always take care to ensure you have the correct size combinations as its easy to get thread types and pitches confused meaning incompatibility issues and disappointment when your order arrives.
Fastener Material Key
A2 Stainless Steel - Also known as grade 304 or 18/8. A general purpose grade of stainless steel.
A4 Stainless Steel - Also known as grade 316 or 18/8/3. A higher corrosion resistant, marine grade of stainless steel.
Bright Zinc Plated (BZP) Steel - Non-stainless standard steel grade offering a basic level of corrosion resistance.
Bright Zinc Plated (BZP) USA Grade 5 High Tensile Steel - Equivalent to ISO class 8, a general purpose high tensile grade with a basic level of corrosion resistance.
Mechanically Plated Zinc Steel - Mechanically applied zinc plating, useful to help prevent hydrogen embrittlement.


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