Two piece fastener including a pin with undercut pintail

Details Two piece fastener including a pin with undercut pintail Two piece fastener including a pin with undercut pintail

F - Mech Eng,Light,Heat,Weapons

16

B

85/139

F16B 39/22 (2006.01) F16B 19/05 (2006.01)

Patent

CA 1122829

TWO PIECE FASTENER INCLUDING A PIN WITH UNDERCUT PINTAIL ABSTRACT OF THE DISCLOSURE A two part fastener of the lockbolt type is provided in which the pintail portion is provided with a rollback type land immediately adjacent the breakneck groove having a diameter generally no greater than the root diameter of the pull grooves provided thereon. This reduced diameter rollback type land prevents the separated pintail from interfering with operation of the tool jaws during setting of a subsequent fastener so as to enable the length of the pintail to be reduced to a minimum thereby reducing the cost of materials while enabling use of conventional installation tools

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