Harley Davidson Seat Bolt Polished Billet Stainless Steel Chrome by FGT Motorsport CNC machined from solid billet marine grade 304 stainless Seat bolt is polished to mirror finish and gives a nice Chrome look to any Harley Thread type is 1/4"-20. Please check the existing thread type on your Harley Seat Bolt first to confirm that this product will be compatible. A very small number of Harley models use 1/4"-28 which won't work with this seat bolt. Neoprene washer bonded to corrosion resistant 18-8 stainless steel protects your beautiful chrome and makes for a secure fit Type 18-8 corrosion resistant stainless steel threads