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Stainless Pan Head Bolts

A2 and A4 Stainless Pan Head Bolts/Screws are shown below in various drive types. Almost exclusively fully threaded and a very popular head style, shaped like a saucepan, with rounded sides and flat underside. There are some differences to the top profile, generally to accomodate a different drive type, a slotted stainless pan head bolt will have a flatter head top.
Fastener Material Key
A1
A1 Stainless Steel - Also known as grade 303. A general purpose grade of stainless steel but with better fabrication/machining properties than grade 304.
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.

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