Description Blade bolt. Bolt dimensions: thread size 1-1/4"-12, Overall length 3-3/4", Thread length 1-5/8" - 2-1/2" long, Shank length thru carrier 15/16", Blade mount length 9/16", Head thickness 1/2", Head diameter 2-1/2". Replaces C-48. This item is a suitable alternative for the following: 404-165222, 917079, A-7A5548, A7A5548, BB-18, BB18, C-48, C48BB, FIS18