Round Speed Fixed Washers for Insulation Pins - China Speed Fixed Washers, Insulation Pins&Washers | Made-in-China.com
100pcs Perforated Insulation Pins, 2-1/2 Inch Insulating Nails 1-1/2 Inch Self Locking Washers, 7/8 Inch Dome Cap Washers, Anti-aging Aluminum Insulation Fasteners for Wall and Ceiling - Walmart.com
Metal Screws & Locking Washers – BlueTex Insulation
Self Locking Washers Round, Duct Insulation Pins, Insulation Fasteners Washers, 1/4 Washers Flat, Used to Lock The Perforated Insulation Pins(150Pcs): Amazon.com: Industrial & Scientific
SPAX 75-Count 1-3/4-in Galvanized/Uncoated Anti-Turn Washer in the Anti-Turn Washers department at Lowes.com
Wind-lock ULP-302 Plates, 1-1/4in Plastic Washer for Rigid Insulation, 250/pk