REPLACEMENT PARTS FOR BIG TWIN CRANK SHAFT

6. Crank Pin Nut Kit Big Twin thru 1981, Fits Big Twin models from 1954-early 1981. 1"-18 thread (OEM 23966-54A), USA Made

A wide selection of high quality replacement parts for all Big Twin 1936-2000 like Flathead (Sidevalve), Knucklehead, Panhead, Shovelhead and Evolution Big Twin. Each part is quality checked. Crank pins and shafts are machined from super tough, aircraft quality steel, heat treated and hardened to 61-63 on the Rockwell scale.