Fastener having multiple-bossed lead

Details Fastener having multiple-bossed lead Fastener having multiple-bossed lead

F - Mech Eng,Light,Heat,Weapons

16

B

F16B 35/00 (2006.01) B21H 3/02 (2006.01) B21H 3/06 (2006.01) F16B 25/00 (2006.01) F16B 33/02 (2006.01)

Patent

CA 2390967

A threaded fastener includes a lead having bosses separated from one another by bases along the thread crest. Two such leads may be formed such that lead-in profiles for one lead are disposed at locations corresponding to locations of lead-out profiles for the other lead. The lead-in and the lead-out profiles of the bossed, and other features of the bosses and bases may differ from one another along the fastener shank. The boss profiles may be selected to reduce insertion torque and to provide excellent resistance to pullout. The fastener may be formed by roll threading via a tool made by a plunge EDM process.

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