Nut with sealing insert

In sealing and locking means of the class described, in combination, a nut body having threads internally thereof, a male threaded device engaging the internal threads, an insert cavity in one end of said body, said cavity including a cylindrical section and a conical portion extending inwardly toward the axis of the body from the inner end of the section at a first angle, said section being knurled, and an insert of material having an excellent elastic memory and lubricity in said cavity with a conical portion at one end lying at a lesser angle than that of the cavity conical portion mentioned for the entire peripheral extent thereof, the planes of said portion and section intersecting at the inner end of the section aforesaid, the conical section of the insert comprising the locking element thereof, said insert having a central opening defining a cylindrical inner surface, the diameter of said inner surface being slightly greater than that of the root diameter of the internal threads, said insert extending from the cavity, a sealing collar integral with the insert extending oppositely from the conical portion, said collar being cylindrical with the inner surface thereof being axially aligned with said inner surface of said insert and of a wall thickness of the order of magnitude of one-half the wall thickness of the insert, and of substantially less longitudinal extent than the body of said insert, the end surface of said collar and a surface on said male threaded device having engaging complimentary flat surfaces, each normal to the axis of the body.