Class 411/239 - Including cooperating formations on the axially opposing portions of the nuts

Subclass of Class 411 - Expanded, threaded, driven, headed, tool-deformed, or locked-threaded fastener
Definition: Device wherein both of the internally threaded elements
No. of patents: 3
Last issue date: 03/21/2006

Number	Title	Issue Date
7014404	Nut member with tightness-indicating protrusions and loosening-preventing recesses A nut member has first and second end faces and corners, and is formed with a plurality of protrusions, each of which is disposed at a respective corner and each of which has a lateral inner face that extends from the second end face, and a plurality of recesses, ea...	03/21/2006
5071300	Shrouded jam locknut A shrouded jam locknut including a body member of frustoconical configuration having a larger base and a smaller base, a recess extending inwardly into the body member from the larger base and terminating at a shoulder for bearing against a nut in locking...	12/10/1991
4826376	Lock nut and method for making same A lock nut arrangement formed of a first and second generally C-shaped nut member which are joined together in a manner allowing limited axial movement and free rotation relative to one another about the axis were two members were initially threaded to ce...	05/02/1989

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