Fastener with a modified thread form

Details Fastener with a modified thread form Fastener with a modified thread form

F - Mech Eng,Light,Heat,Weapons

16

B

85/105

F16B 23/00 (2006.01) F16B 35/00 (2006.01)

Patent

CA 1173677

A FASTENER WITH A MODIFIED THREAD FORM ABSTRACT A threaded fastener with a modified thread form dis- courages a nut from becoming irremovably frozen on the shank of a bolt. A first normal thread extends from a base reference surface to a height on the fastener shank to permit full thread engagement by a nut. Axially outwardly along the shank from that point, there is provided a second thread of reduced crest diameter but still of sufficient size to engage the threads on the nut. This reduction in thread diameter provides additional clearance to permit the nut to be backed off in spite of marred threads or paint or rust buildups.

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