Vibration resistant fastener

Details Vibration resistant fastener Vibration resistant fastener

F - Mech Eng,Light,Heat,Weapons

16

B

85/72

F16B 39/30 (2006.01) F16B 37/12 (2006.01)

Patent

CA 1040084

ABSTRACT OF THE DISCLOSURE A vibration resistant threaded fastener such as a set screw and method of forming the fastener wherein the load bearing flank of the thread surface of the screw is provided with a series of serrations. Each serration is formed with an in- clined ramp terminating in a buttress forming a skewed angle with the radius of the fastener. The ramp surface is inclined in the direction of tightening the fastener so that the buttress presents a surface tending to act against rotation of the fasten- er to preclude its loosening. In forming the vibration resis- tant fastener a pair of flat thread roll dies may be used. Each die is provided with a mating segment near the end of the effect- ive thread forming portion of the die having a configuration designed to impart the ramp and buttress serrations on the load bearing flank of the fastener rolled between the dies. - 1 -

226686

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