Screws, Bolts, Nuts manufacturer / supplier in China, offering 1/4 X 1-3/4" Hex Head Concrete Screw Anchor, for Anchoring to Masonry, Block or Brick, DIN 938 DIN835 DIN940 DIN797 DIN6379 Custom Grade4.8 10.9 M24 PTFE Coated Studs Bolt, DIN982 / ISO 7040/ASME B 18.16.6. Nylon Insert Lock Nut and so on.