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Industrial Fastener Manufacturer for Construction and Engineering

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Find the Right Fastener for Your Application

Explore Wotu’s range of self-drilling screws, self-tapping screws, bolts, nuts, U-bolts, anchor bolts and washers for construction, steel structure, roofing and industrial fastening applications.


Our products are available in multiple sizes, standards, head types and surface finishes. We also support bulk orders, customized non-standard fasteners, neutral export packaging and private-label requirements.

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Hot-Dip Galvanized Hex Head Bolt (DIN931 Half Thread / DIN933 Full Thread / GB30 Chinese National Standard Bolt, Can Be Equipped With Nut And Washer Set)

Brand: Wotu Surface: overall hot-dip zinc plating treatment Specifications: Comply with DIN and GB standards, in stock M6-M48 full range of specifications, length 20mm-300mm, supports nonstandard customized. Packaging: woven bag inside / 25kg export carton, film-wrapped wooden pallet; supports neutral packaging and customer private-label customization.

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Fastener Solutions for Your Project

Tell us the fastener type, standard, size, material, surface treatment, quantity and application requirements.

Our team will help you select the right fastener, confirm customization options and prepare a quotation for your project or bulk purchase.

Information Required for a Fastener Quote

  • • Required product type: self-drilling screw, self-tapping screw, bolt, nut, U-bolt, anchor bolt or washer
  • • Standard, diameter, length, thread and other specification requirements
  • • Material and required surface treatment
  • • Application, working environment and performance requirements
  • • Estimated order quantity and packaging requirements
  • • Drawing, sample photo or existing product specification, if available
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