F - Mech Eng,Light,Heat,Weapons – 16 – B
Patent
F - Mech Eng,Light,Heat,Weapons
16
B
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
Berg Ramon A.
Bjorklund Lowell L.
Friedland George A.
Illinois Tool Works Inc.
Meredith & Finlayson
LandOfFree
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