Description: 411 expanded, threaded, driven, headed, tool-deformed, or locked-threaded fastener / 411 expanded, threaded, driven, headed, tool-deformed, or locked-threaded fastener/(190) having structure to restrict rotation of threaded, mating pieces (e.g., nut lock) (259) comprising a thread lock (276) having the internally threaded element distorted (285) axial distortion (290) including a region displaceable generally axially relative to another part of the element (291) having at least one region formed by a cut, slot, etc., across at least one sidewall of the element and extending generally radially into the element
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