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) (204) structure is coaxial, distinct member (e.g., washer, key, or nut portion) that restricts nut piece (222) internally threaded locking member (e.g., jam nut) (223) including means associated with at least one of the nuts for restricting rotation therebetween (224) key received in part in each of the nuts (225) including a plastically deformable portion
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