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Socket Countersunk Screws

Socket Countersunk Screws often know as Flat Head Screws have a contersunk head that when fitted sit flush within the receiving surface. Fastened into place using a Hex, Allen or Torx Key with the newer Torx drive giving a much more engaged drive where more torque can be applied. Available in metric and imperial sizes. Socket Countersunk Screws are a very popular fastener, but care must be taken when purchasing as they do not automatically come fully threaded above certain lengths.
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.
Black oxide high tensile steel class 12+ - a high tensile non-stainless grade with a black oxide finish offering limited corrosion resistance
Bright Zinc Plated (BZP) Steel - non-stainless standard steel grade offering a basic level of corrosion resistance.
Bright Zinc Plated (BZP) Class 10 high tensile steel - a high strength non-stainless grade for screws and bolts, with a basic level of corrosion resistance.