The bolt and nut used in railway
Material : Q235
The surface with the pot galvanizing 5.6 grade
We could produce the screws and nets accoring to your demand.
Features: Self-drilling Screws: Hex Washer Head, Flat Head, Pan Head, Modified Truss Head, Hex Head with EPDM washer, Self-drilling Screws with Wings Drywall Screws: Bugle Head fine thread or coarse thread, Sharp point or self-drilling Chipboard Screws: Pozi Drive or Torx Drive Window Screws: Phillips Drive or Square drive Collated Drywall Screws: #6(3.5mm), #7(3.9mm), or #8(4.2mm)
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