300PCS Tile Backer Board Washers, Insulation Washers Washer for Screws 35mm Six‑Hole Stainless Steel Building Panel Home Renovation and Hotel Construct

Product Parameter: tile backer board washers are sold as one complete kit with 150 gaskets and 150 matched self‑tapping screws, washer diameter 35 mm, screw size 29 mm × 8 mm, 0.1‑mm‑thick washers and total package weight of 600 g Material Introduction: insulation washers are manufactured from high‑quality 304 stainless‑steel with galvanized rust‑proof surface treatment, featuring good wear resistance, anti‑deformation capacity and corrosion resistance fit for indoor‑outdoor work Even‑pressure Protection Structure: washer for screws adopts six‑hole disc‑shaped layout to distribute fastening pressure and prevent plate cracking, the countersunk hole keeps the surface flat without raised screw heads High‑adhesion Perforated Design: stainless steel washers come with reserved holes to boost the adhesive force of plaster and glue, reduce the chance of panel peeling and deliver effortless, time‑saving installation work Multi‑purpose Fastening Application: penny washers can fasten insulation panels, tile backer‑boards and gypsum boards, ideal for household renovation, hotel construction projects and various building‑fixing assignments