Cast and chrome plated mounting nuts used to hold the wiper transmissions where they pass through the cowl. This reproduction replaced original GM part number 4648790, 5/8" X 22 thread by gauge. Items sold as pairs only, manufactured by Fusick Automotive Products, satisfaction always guaranteed. Fits all 1954-57 Oldsmobile models, 1954-56 Cadillac all models, 1958 Buick all models.