Fastener mandrel and method

Details Fastener mandrel and method Fastener mandrel and method

1989-11-01

1990-11-13

Smith, Gary L.

Expanded, threaded, driven, headed, tool-deformed, or locked-thr

Having separate expander means

Frangible member

411 34, 411 70, F16B 1304

Patent

active

049697854

ABSTRACT:
A fastener for securely fastening a plurality of members having a sleeve with a generally tubular portion and a flange extending radially from one end of the tubular portion and having a mandrel with an enlarged head and a generally cylindrical stem, the stem having a grooved locking section in which the locking groove has a longitudinal component and an adjacent tapered section containing a breakneck groove, the tapered section tapering radially outward toward the mandrel head and ending in a shoulder having an outer diameter signal to or greater than that of the locking section to provide a surface for improved retention of the mandrel with respect to the sleeve when the fastener is installed.

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