1977-06-09
1978-11-14
Britts, Ramon S.
81119, F16B 2300
Patent
active
041250516
ABSTRACT:
A threaded fastener with a low profile head designed to prohibit unauthorized removal. The upper surface of the head is configured to include a very short cylindrical boss, coaxial of the fastener and a plurality of ribs extending radially outwardly therefrom formed on an otherwise flat, circular flange. The ribs include a perpendicularly disposed driving surface of low height extending from the flat surface and an angled camming surface intersecting with the driving surface.
Herkes Daniel J.
Wagner David P.
Beart Robert W.
Britts Ramon S.
Buckman Thomas W.
Illinois Tool Works Inc.
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