CNBTR Soft Rubber Screw Thread Protector Cover Vinyl Round Rubber Hose End Caps Rubber Finisher Pipe Stop Pack of 10 (14mm, Black) Material: Rubber ; Application: hardware accessories Functions as a Thread Protector against shocks. Rubber Hose end caps can be used in stainless steel braided hoses, alloy hard pipe, etc Simply slide over the threaded end of the screw or bolt.