An Invitation To Visit Handan Haosheng Fastener Co., Ltd. At FASTENER POLAND® 2026

Hexagon flange head screws conforming to DIN 6921 and ISO 1665 standards, featuring either smooth or serrated bearing surfaces, represent highly adaptable and dependable fastening solutions. Engineered for optimal clamping performance and uniform pressure distribution, these fasteners significantly reduce the potential for surface damage to assembled materials.

Our Dacromet Coated Flat Washers are high-performance fastening components designed for applications where standard zinc-plated washers fail. The advanced inorganic zinc-aluminum flake coating provides exceptional protection against rust, salt, chemicals, and high temperatures—making these washers the ideal choice for automotive, marine, construction, and outdoor industrial applications.

We are a professional flange bolt manufacturer specializing in high-quality DIN 6921 hex flange bolts, serrated flange bolts, and customized industrial fasteners. Our flange bolts are widely used in automotive, machinery, construction, energy and industrial assembly applications.

With advanced production equipment and strict quality control processes, we provide reliable fastening solutions for global customers. Standard and customized flange bolts are available according to drawings, specifications and application requirements.

Source high-performance PTFE Teflon coated hex bolts from a leading China factory. Our expert suppliers provide corrosion-resistant, FDA-compliant fasteners designed for extreme temperatures and chemical environments to ensure maximum industrial reliability.

Our DIN 1587 Acorn Nuts (also known as cap nuts or dome nuts) feature a rounded, domed top that completely covers the end of a bolt or threaded stud. This design provides a clean, finished appearance while protecting exposed threads from damage, dirt, and corrosion. Manufactured to strict DIN 1587 standards, these nuts are the professional choice for visible fastening applications.

Looking for high-performance Flange Sleeve Anchors? As leading China suppliers and a professional factory, we provide integrated hex flange nut expansion anchors for superior load distribution in concrete and masonry.

Our DIN 935 Hex Castle Nuts (also known as Hex Slotted Nuts) are precision-engineered, single-piece fasteners designed for secure, vibration-resistant connections where reliable mechanical locking is essential. Featuring a standard hexagonal body with a cylindrical upper section containing precisely machined slots, these nuts are engineered to work in conjunction with cotter pins or wire to create a permanent, fail-safe lock. Manufactured in strict compliance with DIN 935 standards, they offer consistent quality and reliability for mechanical, automotive, and industrial applications where safety is paramount.

High-precision DIN 935 Hex Castle Nuts from a leading China factory. Our professional suppliers provide vibration-resistant slotted nuts in carbon and stainless steel for automotive and industrial safety.