F - Mech Eng,Light,Heat,Weapons – 16 – B
Patent
F - Mech Eng,Light,Heat,Weapons
16
B
85/107
F16B 25/00 (2006.01) F16B 25/10 (2006.01)
Patent
CA 1142000
SELF-DRILLING, SELF-TAPPING FASTENER ABSTRACT A self-drilling, self-tapping screw has a drill tip formed by a pair of conical segments. Each segment has a flat side and a rounded tip with one segment being longitudinally offset with respect to the other. The shorter, offset segment may have a greater included angle. At least a portion of the flat side of the second segment is coplanar with the flatside of the first segment. The screw preferably includes a quad- lead thread having two crests with a first diameter and two crests with a second larger diameter.
372182
Illinois Tool Works Inc.
Meredith & Finlayson
LandOfFree
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