Yellow Zinc Plated Carbon Steel Sleeve Anchor Expansion Bolt with Hex Flange Head

Yellow Zinc Plated Carbon Steel Sleeve Anchor Expansion Bolt with Hex Flange Head. Adopts colorful galvanized electroplating treatment with dense zinc coating. Effectively blocks air and moisture to resist oxidation rust for indoor and mild outdoor environments. Compared with stainl. Combined hex nut and large flange washer into an integrated head. No separate flat washer needed during installation; the wide flange surface evenly distributes compression force, avoids sinking into. The expansion tube is designed with longitudinal split slits + anti-slip knurled texture on outer wall. When tightening the head, the sleeve expands evenly and the knurling creates strong friction wit. Made of high-quality Q235 carbon steel with thick tube wall and solid screw rod. Excellent compression, shear and tensile resistance, not easy to bend or deform when fixing heavy loads such as air con. Internal thread inside the expansion sleeve perfectly matches the screw thread. Tightening the hex head directly pulls the screw rod to push the expansion tube open, uniform expansion force without pa.