Abstract: Apparatus for the quantity production of friction nuts prepared for subsequent fusion of thermoplastic resin particles deposited in thread grooves therein, in which the nuts are supported with their axes vertical, a fluid slurry of the particles in a liquid carrier is introduced into the threaded interior of the nuts to fill the threaded opening, including the thread grooves therein, either completely or to a predetermined level from the bottom of the nuts. Excess slurry is then drained from the bottom ends of the openings. The exterior of the nuts is washed or otherwise cleared of any slurry thereon. In order to leave the threads clear of obstruction at the bottom of the nut, the deposited slurry, after partially drying, is removed from the bottom thread convolutions by repeatedly inserting and withdrawing a sponge-like material directly into and out of the lower end of the thread opening, or by strongly agitating a small quantity of water in the lower part of the threaded opening, or otherwise.

Abstract: A friction material in the form of a substantial percentage of cured or polymerized powdered nylon and/or teflon resin is mixed in a binder which is mainly fluid epoxy resin and an activator therefor, and applied to the threaded portion of a threaded member. The epoxy resin is reacted by the activator at room temperature or at least at a temperature well below the fusion point of the nylon or teflon particles to bond the powder particles together and to establish a bond to the thread surfaces to form a substantially uniform mixture of the powder particles and binder and to form a substantially solid, non-tacky, resilient friction element strongly bonded to the thread surfaces and frictionally interfering with the threads of a mating threaded member.

Abstract: Quantity production of friction nuts prepared for subsequent fusion of thermoplastic resin particles deposited in thread grooves therein, in which the nuts are supported with their axes vertical, a fluid slurry of the particles in a liquid carrier is introduced into the threaded interior of the nuts to fill the threaded opening, including the thread grooves therein, to a predetermined level from the bottom of the nuts. Excess slurry is then drained from the bottom ends of the openings. In order to leave the threads clear of obstruction at the bottom of the nut, the deposited slurry, after partially drying, is removed from the bottom thread convolutions by repeatedly inserting and withdrawing a sponge-like material directly into and out of the lower end of the thread opening, or by strongly agitating a small quantity of water in the lower part of the threaded opening.

Abstract: A method of providing a uniform tightly adhered solid substantially continuous deposit of a friction-producing resin, such as nylon, in the bottom of the thread grooves of a threaded metal member, preferably of the type in which the threads' surfaces are identified in the trade as phosphate or phosphated surfaces, which comprises forming a 1-3% alcohol flow-promoting solution of a polymeric material selected from a group consisting of acrylic material, polyesters, polyvinyl acetates and nylons, applying the solution to the area of the threads in which the friction-producing deposit is to be made to form a thin uniform film of the solution on the thread surfaces, preparing a substantially aqueous viscous fluid mixture of the cured friction-producing resin powder, applying the mixture to the coated threaded surfaces to form in the thread grooves a deposit concentrated in the bottom of the thread grooves to a depth sufficient to interfere with at least the crests of threads of a mating threaded member, drying th

Abstract: A nut having a threaded opening in which the sides of the threads are substantially uniformly coated from root to crest thereof with a thermoplastic material; also the method of producing the article in which an excess of powdered thermoplastic material is provided to fill the threaded opening with an excess of material extending beyond an end of the opening. Thereafter, the material is compacted by pressure or vibration to insure that the powdered material substantially fills the thread grooves. The nut is then heated, softening or melting those particles in contact with the thread surfaces, adhering them thereto, after which the remaining material in the threaded opening is eliminated.

Abstract: Thread locking structure in which the separate fluid parts of a two-part adhesive (such as an epoxy resin and an activator) are applied in circumferentially related relation to the threads of a threaded member such as a bolt. At least one pair of adjacent edges of the deposits are in contact and the parts are covered with a single protective sealing film such for example as polyvinyl alcohol. One or both of the deposits contains a substantial percentage of particles of polymerized resin such for example as nylon. At the zone where the two different deposits flow together, the materials react and produce a barrier film which limits the reaction and keeps it from spreading circumferentially beyond the narrow zone.

Abstract: Thread locking structure in which the separate fluid parts of a two-part adhesive (such as an epoxy resin and an activator) are applied in circumferentially related relation to the threads of a threaded member such as a bolt. At least one pair of adjacent edges of the deposits are in contact and the parts are covered with a single protective sealing film such for example as polyvinyl alcohol. When the companion threaded member is engaged, the two parts of the adhesive are intermingled mechanically and the setting up of the adhesive is initiated.

Abstract: The method of forming relatively thick deposits of polymeric material on a surface of small threaded articles which comprises forming a thin coating on the surface of a solution of the polymeric material, at least partly drying the coating to eliminate some or all of the solvent for the polymeric material, applying a barrier coating to the polymeric material to protect it from attack by solvent, and applying a second thin coating of a solution of the polymeric material. The operation may be repeated as necessary to build up the required thickness of deposit. Coating is by successive immersions in baths of the polymeric solution separated by immersion in baths of the barrier material, or by other bulk treatment therewith, followed by partial drying before subsequent immersions and final drying after the last immersion.