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Countersunk Screw

Countersunk heads, or flat head screws, are used in conjunction with a countersunk hole. This design permits a clean, flush fit that leaves a neat and tidy finish to whatever project they are employed in. They can be supplied with a number of different drive systems, from the traditional slot to the more modern torx and security types. Countersunk heads are the alternative to surface mounted heads.
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.
BRASS
Brass - Offers an attractive, corrosion resistant finish.
BZP
Bright Zinc Plated (BZP) Steel - Non-stainless standard steel grade offering a basic level of corrosion resistance.
YZP
Yellow Zinc Plated (YZP) Steel - Non-stainless standard steel grade offering a basic level of corrosion resistance but with a Bright Yellow finish.

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