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ASTM A193 Grade B7/B7M Short Threaded Rods – Yellow Zinc Plated
2026-04-27
Product Overview: Our ASTM A193 B7/B7M short threaded rods are designed for high-stress applications requiring both mechanical strength and enhanced surface protection. These rods are manufactured from quenched and tempered Chromium-Molybdenum alloy steel. The Yellow Zinc finish provides a thicker protective layer and superior salt spray resistance compared to standard clear zinc. The B7M version is precision-treated to a maximum hardness of 22 HRC for specialized use in sour gas (H2S) environments. Key Features: • Superior Corrosion Resistance: The Yellow Zinc (Cr6+ or Cr3+ options) coating provides an extra layer of protection against moisture and industrial chemicals. • Specialized Heat Treatment: B7M variants are strictly monitored to meet safety standards for stress-corrosion cracking resistance. • Precision Short-Cut: Professionally cut to specific lengths with clean, chamfered ends for immediate, hassle-free installation. • Full Traceability: Every shipment is backed by a Material Test Certificate (MTC) ensuring compliance with ASTM A193.
B7/B7M All-Thread Rods | Factory Direct | Massive Capacity & Bulk Pricing
2026-04-27
Get your high-strength fasteners directly from the source. As a leading manufacturer specializing in alloy steel products, we provide ASTM A193 B7/B7M long threaded rods with the reliability and scale required for global industrial procurement. • Direct Manufacturer Advantage: Skip the distributors. By sourcing directly from our factory, you secure the most competitive wholesale pricing in the market. • Scale of Production: With a supply capacity exceeding 30,000 MT per month, we are equipped to handle large-scale container orders and tight project deadlines. • Industrial Cost-Efficiency: Our plain-finish rods offer the best value for bulk buyers who require high-strength performance without the additional cost of plating. • Expert Logistics: We provide professional anti-rust oiling and sea-worthy packaging to ensure your products arrive in perfect condition.
ASTM A193 Grade L7/L7M Long Threaded Rods – Blue-White Zinc Plated
2026-04-27
Are you sourcing for large-scale energy or infrastructure projects? As a specialized manufacturer with decades of expertise in high-performance alloy steel, we deliver L7/L7M long threaded rods directly from our production lines to your port. • Manufacturer Pricing: Eliminate the trading markup. We offer direct-from-factory rates that give you a competitive edge. • Massive Supply Capacity: Backed by our extensive alloy steel stock, we ensure stable lead times for high-volume, container-load orders. • Bulk Savings: We support your bottom line with exclusive tiered pricing for bulk purchases and long-term supply contracts. • Export Ready: Expertly packaged and treated for international transit, ensuring your rods arrive straight and rust-free.
Heavy-Duty DIN 934 Grade 2H Hex Nuts – Blue-White Zinc Plating
2026-04-27
Product Description: Engineered for high-pressure and high-temperature environments, our Grade 2H Hex Nuts are manufactured according to DIN 934 (and ASTM A194) specifications. These nuts are heat-treated to achieve the superior hardness and proof load strength required for critical structural and piping applications. Technical Excellence: • Material: Premium quenched and tempered carbon steel. • Surface Finish: High-quality Blue-White Zinc plating provides an aesthetic finish with reliable corrosion resistance. • Performance: Exceptional load-bearing capacity, specifically designed to pair with Grade B7 and B16 threaded studs. • Precision: Rigorous thread gauging to ensure a perfect fit and prevent galling.

Dacromet (Zinc-Aluminium Flake Coating)

 Dacromet is a water-based, chromium-free (early versions contained chromium) anti-corrosion coating. 

 Dacromet is a water-based, chromium-free (early versions contained chromium) anti-corrosion coating. 

Process Principle
Dacromet is a water-based, chromium-free (early versions contained chromium) anti-corrosion coating. Fasteners are dip- or spray-coated with a slurry containing zinc and aluminium flakes and special binders, then cured at about 300 °C to form a silver-grey, fish-scale-like dense protective layer.

 

Key Characteristics

Excellent corrosion resistance – though only 4–8 μm thick, it outperforms conventional zinc electroplating by 7–10 times; NSS can exceed 1200 hours.

No hydrogen embrittlement – no electrochemical steps, making it ideal for high-strength fasteners (Grade 12.9 and above).

High heat resistance – withstands >300 °C, while conventional zinc coatings may fail above 100 °C.

Environmentally friendly – modern processes produce no waste water or gases.

Lower coating hardness – relatively soft and can be scratched during installation if not handled carefully.

 

Applications
Widely used in demanding corrosion-protection applications: automotive chassis, wind power fasteners, bridge cables, offshore engineering, aerospace. Despite higher cost, its excellent overall performance makes it a top choice for premium fasteners.

Process Principle
Dacromet is a water-based, chromium-free (early versions contained chromium) anti-corrosion coating. Fasteners are dip- or spray-coated with a slurry containing zinc and aluminium flakes and special binders, then cured at about 300 °C to form a silver-grey, fish-scale-like dense protective layer.

 

Key Characteristics

Excellent corrosion resistance – though only 4–8 μm thick, it outperforms conventional zinc electroplating by 7–10 times; NSS can exceed 1200 hours.

No hydrogen embrittlement – no electrochemical steps, making it ideal for high-strength fasteners (Grade 12.9 and above).

High heat resistance – withstands >300 °C, while conventional zinc coatings may fail above 100 °C.

Environmentally friendly – modern processes produce no waste water or gases.

Lower coating hardness – relatively soft and can be scratched during installation if not handled carefully.

 

Applications
Widely used in demanding corrosion-protection applications: automotive chassis, wind power fasteners, bridge cables, offshore engineering, aerospace. Despite higher cost, its excellent overall performance makes it a top choice for premium fasteners.

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