Torque limiting elastomeric fastener for screw threaded member

A reusable self torque limiting elastomeric unthreaded member and threaded member type clamping combination having a preselectable screw-induced torque maximum beyond which continued screw-on rotation of said members produces no additional axial relative movement between said members,

• said combination comprising a screw-threaded member and an unthreaded member,
• said unthreaded member comprising a cylindrical screw-thread engaging member of an elastomeric material resiliently deformable without permanent thread formation in said unthreaded member by selectable interference fit engagement between said unthreaded member and the peripheral portions of the thread of said threaded member as screw-on relative rotation of said members produces screw-induced torque forces and axial travel of said members toward each other,
• said unthreaded elastomeric member having abutment means
• for engaging a part to be clamped and
• for supplying selectable resistance force to the relative axial movement of said members during said screw-induced axial travel, said resistance forces and said torque forces combining to provide a limit to said screw-induced axial travel, and
• for achieving preselected radical thread-lock and axial clamping forces at said limit of said screw-induced travel sufficient to maintain said clamping combination of said members in clamping relationship to a member to be clamped.