9/16 x 3.5-inch Greaseable Shackle Bolt

9/16 x 3.5-inch greaseable shackle bolts are necessary to fasten the 8mm x 45mm shackle springs to the centre rocker arms.

Steel on steel parts requires grease to help reduce wear and tear.

Nylon or Polyurethane are self-lubricating spring insert bushes that do not require greaseable shackle bolts.