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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 Chinese National Standard Flat Washer (GB/T97.1A Level Flat Washer)

Brand: Wotu Surface: overall hot-dip zinc plated anti-corrosion treatment, optional blue-white zinc plated, color zinc plated, black oxide Specifications: Execute GB/T97.1-2002 Chinese national standard, in stock M6-M64 full range of specifications, inner diameter, outer diameter, thickness strictly comply with Chinese national standard parameters, support nonstandard size customized Packaging: 25kg woven bag / export carton packaging, full pallets wrapped with film, supports 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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