
As a leading hex bolt manufacturer and China-based fastener factory, we cut supply chain layers with factory-direct pricing while engineering solutions for harsh industrial and construction environments—from corrosive offshore platforms to high-vibration manufacturing lines.

Our production line leverages CNC machining (for wholesale CNC machined 5/8 inch carbon steel cable expansion heads) and heat treatment to deliver high tensile strength—such as ASTM A193 B7 stud bolts with a 120,000 psi minimum tensile strength. Surface treatment options include hot dip galvanized bolts (HDG) for superior corrosion resistance, PTFE (Xylan) coating for anti-galling and 3,000+ hour salt spray protection, and zinc plating for cost-effective rust resistance. We adhere strictly to global standards: DIN 933 vs DIN 931 (hex bolt head design distinctions), ISO 898-1 for high strength bolts, and ASTM A193 for pressure vessel applications—ensuring every fastener meets the exact specs your project demands.
Our optical sorting machine automates inspection of fastener dimensions (e.g., thread pitch, head diameter) and surface defects, reducing human error by 90%. Performance testing includes tensile strength verification for High Strength Bolts Grade 8.8, salt spray testing (1,000 hours for M16 316 stainless steel external tooth lock washers, 3,000+ hours for PTFE coated ASTM A193 B7 studs), and torque testing for hex head wood screws. We provide full traceability with material test reports (MTRs) and compliance certificates for DIN, ASTM, and ISO standards—critical for industries like oil & gas and aerospace where accountability is non-negotiable.
Our Hex Head Wood Screw features mild steel or stainless steel construction with zinc-plated/galvanized finishes and high torque capacity (compatible with wrenches/sockets) for secure wood-to-wood or wood-to-metal connections in construction renovation, decking, and fence installation. For heavy-duty needs, the wholesale CNC Machined 5/8 Inch Carbon Steel Cable Expansion Head offers precision CNC-machining for tight tolerances (±0.02mm), high-strength carbon steel for load-bearing up to 12,000 lbs, and bulk availability with OEM/ODM options for custom coatings (e.g., galvanized) and dimensions—ideal for structural steel bolt applications like bridge guardrails or industrial mezzanines.
The DIN 914 Stainless Steel Fastener Screw Set (M3 size, 12mm length) uses a zinc column end fine thread design for secure locking of gears, pulleys, and machine tool fixtures. Its high-vibration resistance makes it perfect for automotive steering parts and aerospace instrument fittings, while compliance with DIN 914 standards ensures precise positioning and prevents relative rotation in mechanical systems—reducing costly downtime from loose components.
Our M12 Carbon Steel Corrugated Gasket withstands temperatures up to 300℃, offers 5% elasticity to accommodate thermal expansion, and complies with GB/T 19066.3 and ASME B16.20 for boiler pipeline sealing (water walls, superheaters, steam headers). For corrosive environments, ASTM A193 B7 Stud Bolts with PTFE (Xylan) Coating—paired with a Heavy Hex Nut (ASTM A194 2H)—are ideal for oil & gas, offshore platform, and chemical plant applications. As explained in our guide on why PTFE Xylan coated bolts are the best choice for offshore chemical industries, the PTFE coating reduces the friction coefficient to 0.15, preventing galling even in high-pressure environments.
The M16 316 Stainless Steel External Tooth Lock Washer uses marine-grade 316 stainless steel (2–3% molybdenum) for chloride ion resistance and passes a 1,000-hour salt spray test. Its external tooth design (DIN 6798) cuts loosening risk by 70% in high-vibration environments—perfect for marine hulls, dock pilings, or offshore wind turbines. For expansion anchor bolt needs in coastal construction, our corrosion-resistant options ensure long-term performance without frequent replacements.

A European coastal bridge project sourced 20,000 hot dip galvanized bolts and 500kg of wholesale CNC machined cable expansion heads from us. A 12-month inspection showed zero corrosion-related failures, reducing annual maintenance costs by $40,000 (2024 data)—a direct result of our factory-direct quality and HDG coating’s ability to withstand saltwater exposure.
An Asian automotive parts manufacturer adopted our DIN 914 stainless steel fastener screw sets for machine tool fixtures. The precise locking reduced component misalignment, cutting unplanned downtime from 8 hours/week to 3.2 hours/week—boosting production efficiency and saving over $50,000 annually in lost output.
A Middle Eastern oil & gas client installed our ASTM A193 B7 stud bolts with PTFE coating. A 2-year inspection showed no galling or corrosion, extending fastener lifespan from 2 years to 6 years and reducing replacement labor costs by 65%. This aligns with our focus on strategic fastener solutions to overcome industrial challenges, where durability and cost savings go hand in hand.
As a leading hex bolt manufacturer and China-based fastener factory, we specialize in factory-direct wholesale industrial bolts, custom OEM fasteners, and precision-engineered solutions—including structural steel bolts, expansion anchor bolts, PTFE-coated fasteners, and High Strength Bolts Grade 8.8. Our product portfolio covers critical applications: construction woodwork (hex head wood screws), heavy-duty fastening (CNC-machined cable expansion heads), mechanical locking (DIN 914 sets), and high-temperature sealing (M12 corrugated gaskets). Whether you need bulk wholesale for a large infrastructure project or custom designs for a unique manufacturing line, we deliver consistency, compliance, and cost efficiency—backed by 20+ years of experience in global fastener markets.
To discuss your specific fastener requirements—including OEM/ODM customization, bulk pricing, or compliance with DIN, ASTM, or ISO standards—contact our team today for a tailored solution. Visit our contact page to get started.
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