Washer Pins - Powder Actuated Fastening Systems 1 1/2“ Inch Washered Pins Construction Fastener Nail (100pcs per Box): Amazon.com: Industrial & Scientific
DEWALT 25-Pack 1-1/2-in Washered Drive Pin in the Powder Actuated Fasteners department at Lowes.com
Simpson Strong-Tie 1-1/2" Drive Pin With Washer 100/Box - White Cap