Material: stainless steel Color: silver Overall diameter: 19mm/0.75 Total length: 18mm/0.71 Thread diameter: 6mm/0.24 Thread length: 11mm/0.43 Product included: 1 seat nut. 1996-2017 Sportster 1 Piece Stainless Steel Seat Mounting Bolt Nut Fits upper fender rear seats, not single or outboard seats. Easy grip and quick release for tool-free installation and removal. If the fender has a plastic cap instead of a nut insert, remove the cap and use the nut kit to install the freestanding or rear seat. Fits: 1996-2017 Sportster, Street Bob, Fatbob, Streetbob, Softail, Road Glide, Ultra Glide, Touring and other models with 1/4-20 threads.