Simpson Strong-Tie offers a full range of gas- and powder-actuated tools and fasteners designed to maximize jobsite productivity and operator comfort. The PINWP is a powder-actuated washered pin designed to fasten rigid insulation board to building structures. The PINWP consists of a 0.300-in. headed fastener with a pre-mounted 1-3/8 in. flat plastic washer. The PINWP is for high-volume applications and is designed for fastening into concrete and steel. PINWP 1-1/2 in. Powder-Actuated Plastic-Washered Pin for Insulation Board (50-Qty) (Pack of 31500).