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ASME B18.2.2
GYF
Our Heavy Hex Nut ASTM A194 Zinc Plated is a professional-grade industrial fastening solution engineered specifically for high-pressure, high-temperature and corrosive service environments, fully compliant with ASTM A194 international standards. Targeted at industrial manufacturing and engineering procurement clients, this heavy hex nut is designed to pair seamlessly with ASTM A193 alloy steel bolts, delivering exceptional clamping force and long-term stability in extreme working conditions. The high-quality zinc plated finish provides robust corrosion protection, extending service life and reducing maintenance costs for critical industrial applications. With a heavy structural design optimized for pressure resistance, our zinc plated ASTM A194 heavy hex nuts are the industry standard for critical fastening in high-risk industrial sectors.
All our ASTM A194 heavy hex nuts strictly meet the rigorous chemical composition, mechanical performance and heat treatment requirements of the ASTM A194 standard, with available grades including 2H, 2HM, 7, 7M, 8 and 8M to adapt to diverse extreme working conditions.
The professional zinc plating process creates a dense, uniform protective layer, providing sacrificial anode protection against atmospheric, moisture and mild chemical corrosion. We offer both electro-galvanized and hot-dip galvanized options, with salt spray resistance ranging from 48 hours to 1000 hours based on coating thickness, suitable for both indoor and harsh outdoor environments.
Optimized material formulation and heat treatment processes enable our zinc plated heavy hex nuts to operate reliably in a wide temperature range from -50℃ to 500℃, with excellent creep resistance and stress relaxation performance to maintain stable clamping force under continuous high-pressure loads.
Precision-machined threads (UNC, UNF, 8UN for inch series, metric coarse/fine for metric series) ensure perfect fit with matching bolts, delivering uniform clamping force distribution, excellent vibration resistance and minimal loosening risk in long-term cyclic load scenarios.
Parameter | Specification |
Standard | ASTM A194 |
Core Material | Carbon Steel, Alloy Steel, Stainless Steel (Grade-specific) |
Surface Finish | Zinc Plated (Electro-galvanized / Hot-dip Galvanized) |
Available Grades | 2H, 2HM, 4, 7, 7M, 8, 8M |
Thread Type | UNC, UNF, 8UN (Inch); Metric Coarse, Metric Fine (Metric) |
Size Range | 1/4" to 4" (Inch), M6 to M100 (Metric) |
Hardness | Grade-specific, strictly conforming to ASTM A194 requirements |
Proof Load | Meets or exceeds ASTM A194 mandatory standards |
Operating Temperature Range | -50℃ to 500℃ (Grade-dependent) |
Corrosion Resistance | 48-1000 hours salt spray resistance (coating thickness dependent) |
Our zinc plated ASTM A194 heavy hex nuts are the preferred fastening solution for critical industrial sectors, including:
Oil and gas extraction equipment, refinery pipelines, chemical plant reaction vessels and flange connections, providing reliable fastening in high-pressure, corrosive process environments.
Thermal power plant boilers, nuclear power equipment, geothermal generation systems and high-pressure steam pipelines, meeting the strict safety requirements of high-temperature, high-pressure energy production.
Pressure vessels, industrial valves, pump bodies, heat exchangers and hydraulic equipment, ensuring stable clamping force for sealed connections under extreme pressure conditions.
Shipboard equipment, offshore drilling platforms, port machinery and coastal infrastructure, with zinc plated finish providing reliable corrosion resistance in salt spray and humid marine environments.
We serve industrial manufacturing and engineering procurement clients with flexible bulk supply solutions, with full in-stock coverage of standard sizes and grades to support fast delivery for both urgent small-batch orders and long-term large-scale procurement contracts. Our custom manufacturing services include non-standard size customization, special coating thickness adjustment, custom thread specifications, special material formulation and branded packaging solutions. All products come with full traceability documentation, including material certificates, heat treatment reports, coating test reports and third-party inspection certificates, with production fully certified by international quality management systems.
ASTM A194 heavy hex nuts are specifically designed for high-pressure and high-temperature service environments, primarily used in petrochemical, power generation, pressure vessel and high-pressure pipeline applications, almost always paired with ASTM A193 high-strength bolts.
Electro-galvanizing delivers a thin, uniform coating with a smooth appearance, ideal for indoor and general corrosion environments. Hot-dip galvanizing provides a much thicker coating with superior salt spray resistance, making it the preferred choice for outdoor, humid and high-corrosion marine environments.
Grade 2H is the most widely used carbon steel grade, suitable for most general high-pressure applications at ambient temperatures. Grade 7/7M are stainless steel grades for corrosion-resistant scenarios, while Grade 8/8M are designed for high-temperature high-pressure service.
Yes, every batch of our ASTM A194 heavy hex nuts comes with complete traceability documentation, including material test reports (MTRs), heat treatment records, coating thickness test reports and optional third-party inspection certificates to meet your project compliance requirements.
For industrial engineering and procurement professionals seeking reliable Heavy Hex Nut ASTM A194 Zinc Plated solutions, we offer free custom quotes, professional technical support, sample testing services and rapid response to all your procurement inquiries. Whether you need standard bulk supply for ongoing production or custom-engineered products for special extreme working conditions, we can deliver standard-compliant, high-quality fastening solutions tailored to your exact needs. Contact us today to receive your free, no-obligation custom quote.
