Welcome to China Anchor Bolt Factory – Your Top Source for High-Quality Concrete Bolts! Our range includes top-notch ASTM F1554 GR.55 compliant bolts made from premium 40Cr material. Available in a sleek black finish, these 1-1/4 inch - 7 UN bolts, with a length of 2000 mm, are engineered to perfection. Trust us for standardized excellence in anchor bolts for your concrete projects.