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 S/S 4 Pipe Stinger Exhaust $399.95 Trans Mt. Adap. Kit, 73-79 Chassis with 2-Bolt Nose Cone (61-72 Trans) $105.95 Chrome Spring Plate Caps - I.R.S., Pair $34.95 Sold Out EMPI Polished Alum. T-Handle Shifter, Standard, 12" O.A.L. $99.95 EMPI Off-Road Type 2 C.V. Joint Only $115.95