18mm Hex Head Greaseable Shackle Bolt

18mm Hex Head Greaseable Shackle Bolt is the centre bolt on 60mm rocker roller centre rockers. The bush on this rocker cannot be replaced.

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.