Seat washer 4x40mm plastic

The Tillett nylon anti penetration washers conform to the CIK and MSA seat mounting regulations.

All seats must have a metal or nylon reinforcement on all anchorage points between the seat supports and the seat. Reinforcement washers must have a minimum thickness of 1.5 mm and a diameter of at least 40 mm. All supports must be bolted or welded at each end.