Flush head fastener

Details Flush head fastener Flush head fastener

F - Mech Eng,Light,Heat,Weapons

16

B

26/100, 85/3

F16B 19/00 (2006.01) F16B 31/00 (2006.01) F16B 33/00 (2006.01)

Patent

CA 1308581

Improvement to Flush Head Fastener Abstract of the Disclosure The invention is a flush head fastener (14) for joining two or more structural elements (10,12) together. The structural elements have a fastener hole (18) therein with one of the structural elements (10) being countersunk to accommodate the head (30) of the fastener. The fastener includes head (30) and shank (40) portions and a layer of material (50) joined to the top of the head of the fastener which can readily be deformed to fill any gaps between the head and the countersink. Thereafter, the excess material can be removed leaving an aerodynamically smooth surface. The surface also will have no electrical discontinuities. The procedure for installing the fastener includes the steps of 1) providing two or more structural elements (10, 12) having a countersunk fastener hole (18) therein 2) thereafter the fastener is installed in the hole 3) the layer of material (50) is deformed so as to fill any gaps between the head of the fastener and the countersink, and 4) thereafter, excess material is removed leaving a smooth external surface. Preferably, the step of deforming includes the step of heating the layer of material to a point where it is readily deformable.

601615

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