Shop › Shock Boss, Unthreaded 12mm, 1 3/4" Long Image 1 of 1 Shock Boss, Unthreaded 12mm, 1 3/4" Long $4.95 For fabricating shock mounts. Comes in 1/2" or 12mm x 1.5 bolt sizes. Threaded or unthreaded. Add To Cart Added! For fabricating shock mounts. Comes in 1/2" or 12mm x 1.5 bolt sizes. Threaded or unthreaded. C-217-2713-0 You Might Also Like Seat Cover, Black with Square Pattern, Each $80.95 Clamp Nut, 7/8" Shaft $20.95 Air Cleaner Element - Replacement Paper Element $7.95 Universal Seat Slider & Mounting Plate Pr. (1-seat) $110.95 Stainless Steel Coil Cover Set $12.95