Nickel plated stop nut. Fits USA Vintage Series and are the best available replacement parts for '60s original Jazzmasters and Jaguars. The Trem Lock stop 0054475000 UPC 717669154585 sits under the tremolo unit and is internally threaded to accept the threaded portion of the Trem Lock button (Fender part 0054474000). Fender uses a small amount of a Loctite type compound on the threads to maintain tension. Great for restoring older Jazzmasters, Jaguars and for for replacement use in USA Vintage Series instruments. Brand New. Genuine Fender. Our current supply came from Fender as raw parts so no packaging.