Expanded – threaded – driven – headed – tool-deformed – or locked-thr – Threaded fastener locked to a discreet structure – Nut – and means to engage substructure on its opposite faces...
Patent
1983-09-06
1989-03-21
Smith, Gary L.
Expanded, threaded, driven, headed, tool-deformed, or locked-thr
Threaded fastener locked to a discreet structure
Nut, and means to engage substructure on its opposite faces...
411184, 411377, 411903, F16B 39282
Patent
active
048138339
ABSTRACT:
A metal threaded fastener is disclosed for use in outdoor or other environments where fastener rust or corrosion are to be discouraged. The fastener includes a metal head adapted for engagement with a torque wrench or the like. The head is covered by a polypropylene jacket. Raised metal protuberances below from a bottom clamping surface of the head. In one embodiment, these protuberances extend at least partly through the polypropylene jacket, but the thin covering layer of polypropylene is displaced from the protuberances during bolt installation. These protuberances provide metal-to-metal contact with a workpiece, and consequently encourage maintenance of a correct axial clamping pressure without over-torquing the mating nut.
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Brock Bins: Brock Grain Bins, published Mar. 1981, especially p. 4.
Brock Manufacturing, Inc.
Brueske Curtis B.
Smith Gary L.
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