It is a dished or cupped metal washer that provides a larger bearing surface when securing soft materials like plasterboard, foam board, or insulation. The hole in the center allows a screw or nail to pass through, anchoring the washer and attached material securely to wood, metal, or masonry.
Box of Washers
Common Uses:
Securing rigid foam insulation to walls or ceilings.
Attaching plasterboard or drywall over framing.
Holding stucco lath/netting in place before plastering.
Any application where a fastener needs reinforcement over a soft or fragile surface.
