A unique washer design that forms a seal against the washer face of the fastener as well as the roof sheet. The design is self-aligning ensuring that even if the fastener is driven at an angle, the washer seals effectively in all four locations.

FEATURES Extra Strength - metal encapsulated in EPDM for real strength Four Sealing Points - unique design gives a perfect seal Wide size range - from 12mm - 32mm No distortion - engineered to distribute the load SPECIFICATIONS