Stainless Steel 300 Pcs Foam Board Fasteners Washers For Insulation Board Installation Hardware HS DP 05 Durable No Coating Built To Last 28mm Outer Diameter 5.7mm Inner Diameter Heavy Duty Replacement Washers

300-Piece Stainless Steel Foam Board Fasteners and Washers
✔️ 300 pcs, 28mm OD, 5.7mm ID, stainless steel, no coating

These 300 stainless steel foam board washers are designed to fasten insulation boards securely, delivering a clean, durable finish. They’re ideal for home renovations, classrooms, hotels, and other infrastructure installations where a neat, secure hold on foam board is essential.

✅ Outer diameter: 28 mm (1.10 in)
✅ Inner diameter: 5.7 mm (0.22 in)
✅ Material: stainless steel, no coating
✅ Quantity per pack: 300 pcs
✅ Recessed groove for center screw; raised back interlocks with backing board

💡 What is a foam board fastener washer used for in insulation installation? This handy piece secures foam boards to backing surfaces for a neat, durable finish. - anchors foam boards to backing panels - stainless steel construction resists corrosion - ideal for renovation projects in homes, schools, and hotels