Drill screw and die for producing same

Details Drill screw and die for producing same Drill screw and die for producing same

F - Mech Eng,Light,Heat,Weapons

16

B

85/107

F16B 25/00 (2006.01) B21K 1/56 (2006.01) F16B 25/10 (2006.01)

Patent

CA 1070994

DRILL SCREW AND DIE FOR PRODUCING SAME ABSTRACT OF THE DISCLOSURE A drill screw is produced by a pinch pointing die comprising a pair of substantially identical drill point forming portions each of which includes a half conical recess, a half cylindrical recess and a half truncated conical recess. The drill screw thus produced comprises, therefore, substantially identical two half drill point portions each of which includes a half con- ical portion, a half cylindrical portion and a half trun- cated conical portion.

284657

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