Winged drill screw

Details Winged drill screw Winged drill screw

F - Mech Eng,Light,Heat,Weapons

16

B

85/107

F16B 25/02 (2006.01) F16B 25/10 (2006.01)

Patent

CA 2020498

A self-drilling and thread forming fastener for fastening a first softer workpiece, such as wood, to a second harder workpiece, such as metal, is described. The fastener features wings of improved configuration including positive angle of attack, positive cutting edge relief angles, teardrop-like crescent shape cross section and knife-like cutting edge which exhibit taster drill times through wood.

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