Factory direct product lines for construction, steel structure, roofing and industrial fastening projects.
More Products
Self Drilling Screws
Self Tapping Screws
Bolts
Nuts
Founded in the 1990s, Wotu is an integrated manufacturer focused on R&D, production and sales of fastener products. The company covers about 40,000 m² and supports bulk supply, OEM/ODM customization and export packaging.
Main products include self-drilling screws, hex bolts, nuts, railway accessories, power tower fasteners, anchor bolts, electric fittings and customized non-standard fasteners.
Learn More +Production equipment, testing equipment and inspection process support stable quality and delivery.
Fastener matching for roofing, steel structure, photovoltaic mounting and industrial projects.
From raw material verification to final packing, Wotu checks key dimensions, strength, hardness, coating and appearance before shipment, helping buyers reduce project risk and maintain consistent procurement quality.
Thread, head, washer and key dimensions are checked against product requirements before packing.
Tensile performance, hardness and fastening strength are verified according to product type.
Material, coating and surface condition are reviewed to support corrosion resistance and appearance.
Quantity, label, carton and pallet packing are confirmed for export delivery and project use.
Useful fastener knowledge and company resources for procurement decisions.
Practical guidance on surface treatment, storage and project environment selection.
Guidance for stable fastening performance in roofing and metal sheet installation.
Compare head types, washers, coatings and working conditions for B2B procurement.
Send drawings, standards, quantity and application. Our team will provide quotation support and product matching advice.
