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Home   /   A4 Stainless Steel UNF Bolts, Nuts and Washers

A4 Stainless Steel UNF Bolts, Nuts and Washers

The UNF (Unified Fine) threads are part of the Unified Thread Standard (UTS), most commonly employed throughout the United States and Canada. The threaded products on this page utilise this fine pitch UNF standard. The washers available on this page are all designed to be used with inch based fasteners.
Fastener Material Key
A2
A2 Stainless Steel - Also known as grade 304 or 18/8. A general purpose grade of stainless steel.
A4
A4 Stainless Steel - Also known as grade 316 or 18/8/3. A higher corrosion resistant, marine grade of stainless steel.
BZP
Bright Zinc Plated (BZP) Steel - Non-stainless standard steel grade offering a basic level of corrosion resistance.
BZP-G5
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.
BZP-TH
Through (Thru) Hardened Bright Zinc Plated Steel - Carburised or through hardened washer in Bright Zinc Plate finish that has been treated to improve strength.
MZP
Mechanically Plated Zinc Steel - Mechanically applied zinc plating, useful to help prevent hydrogen embrittlement.
ZnFlk
Organic Zinc Flake Coated Steel - Steel parts coated with superior mechanically applied zinc with corrosion resistance lasting 480 hours in the salt spray test.

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