High-Quality Galvanized Carbon Steel Expansion Bolt for Construction. Wide Grade Range: Available in 4.8, 6.8, 8.8, 10.9, and 12.9 grades for diverse strength needs. Comprehensive Standards: Meets ANSI, BSW, DIN, GB, GOST, and JIS international standards. Free Sample Policy: Product samples are provided free of charge, shipping cost borne by buyer. OEM/ODM Support: Accepts OEM and ODM orders for large quantities at no extra charge. Fast Delivery: Large inventory allows quick shipping without delay for regular products. Strict Quality Control: Raw materials tested before production with ISO 9001 compliance. Competitive Pricing: Direct factory pricing with attractive volume discounts for bulk orders. Customization Options: Offers full, minor, and flexible customization from designs.