Stainless steel drill screw and method of making

F - Mech Eng,Light,Heat,Weapons – 16 – B

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10/1, 85/107

F16B 25/00 (2006.01) F16B 33/00 (2006.01)

Patent

CA 1111293

STAINLESS STEEL DRILL SCREW AND METHOD OF MAKING Abstract of the Disclosure A drilling and tapping screw constructed from a 300 series stainless steel material which has the corrosive resistance of the high chromium high nickel content stainless steel while still being cap- able of drilling through carbon steel materials or the like. The product is constructed by forging the point at very slow forging speeds, result- ing in a drill screw which is a predominantly martensitic structure at the drill point while predominantly austenitic in the shank and head regions.

331204

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