Self-extruding fastener

Details Self-extruding fastener Self-extruding fastener

F - Mech Eng,Light,Heat,Weapons

16

B

85/106

F16B 25/00 (2006.01) F16B 25/10 (2006.01)

Patent

CA 1063846

SELF-EXTRUDING FASTENER ABSTRACT OF THE DISCLOSURE A self-extruding fastener having a head pro- vided with a cross groove, a stem having two screw threads and a tapering portion terminating at a sharp pointed forward end adapted to form a guide opening in a thin sheet of metal. A third screw thread generates in a position midway between said two screw threads and in a portion where the stem ends and the tapering por- tion begins, and extends to the pointed forward end, while the two screw threads disappear in the tapering portion. Therefore, the self-extruding fastener accord- ing to the invention comprises three sections, that is, two screw thread section, three screw thread section and one screw thread section.

280061

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