ASME B18.2.2 A194 2H Heavy Hex Nut Hot Dip Galvanized

ASME B18.2.2 A194 2H Heavy Hex Nut Hot Dip Galvanized is a heavy-duty carbon steel fastener engineered for high-pressure pipeline, pressure vessel and heavy industrial assembly. Compared with standard hex nuts, this heavy hex nut features wider wrench flats and greater wall thickness, delivering stronger load-bearing capacity and resistance to loosening under heavy vibration. The hot dip galvanized coating forms a thick, metallurgically bonded zinc layer, providing outstanding corrosion resistance for outdoor, marine and humid working environments. This nut is the preferred matching fastener for flange connections in oil, gas and power industries.

Core Product Advantages

- Standard: ASME B18.2.2, Material: ASTM A194 Grade 2H carbon steel

- Hot dip galvanized finish for long-term rust protection in harsh environments

- Larger hex body for higher tension and pressure resistance

- Full thread precision machining, smooth thread fit with matched bolts

- Batch mechanical property test, meets industrial heavy load requirements

- Clear "2H" marking on each nut for easy material identification

Technical Specifications

Surface Treatment Selection Guide

We provide multiple surface finishes to match different project requirements. Hot dip galvanized is our popular option for anti-corrosion demand. Black oxide and yellow zinc plated versions are also available for selection.

Material & Forging Process

The performance of A194 2H heavy hex nut starts from raw material control. We select qualified carbon steel bars as raw stock. Each steel bar will go through incoming chemical composition inspection before forging. Hot forging shapes the thick hex structure, improving the internal grain structure of steel to achieve high tensile strength and toughness. After forging, threads are precision tapped, followed by heat treatment to meet the mechanical property requirements of ASTM A194 Grade 2H.

Application Scenarios

ASME B18.2.2 A194 2H Heavy Hex Nut Hot Dip Galvanized is widely used in oil & gas pipelines, pressure vessels, power equipment, bridge engineering and heavy mechanical structures. It is designed to cooperate with high-strength bolts to maintain stable clamping force under high pressure and temperature fluctuations. It is commonly adopted on flange connections where safety and long-term reliability are critical.

Quality Inspection Process

We implement multi-stage inspection through the whole production flow. Raw material check, forging appearance inspection, thread gauge test, hardness test and final dimension inspection are carried out batch by batch. Only qualified products can move to surface treatment and packaging. All test records are well kept for traceability, which can support third-party inspection if required by customers.

Why Choose Gangtong Zheli

We specialize in manufacturing ASME standard heavy hex fasteners. Our factory strictly controls raw material quality and forging process. Every batch of ASME B18.2.2 A194 2H Heavy Hex Nut Hot Dip Galvanized will pass thread inspection, hardness test and dimension check before delivery. We support custom sizes, custom marking and flexible MOQ for your project orders. Our technical team can provide professional fastener matching suggestions for your flange projects.

Packaging & Shipment

Export-grade cartons with anti-rust paper inside are adopted for long sea transportation. Custom shipping marks and product labels can be printed as your request. Our logistics team prepares complete export documents to support smooth customs clearance and shorten your lead time. Goods will be firmly packed to avoid collision damage during ocean and land transit.

FAQ

Q1: What is the difference between heavy hex nut and regular hex nut?

A heavy hex nut has a thicker height and wider hex flats, which can bear higher tensile load. It is the standard matching fastener for pressure vessel and pipeline flanges.

Q2: Can you do custom marking on the nuts?

Yes. We can stamp 2H, logo or other custom marks on the nut surface according to your drawing.

Q3: What is the lead time for bulk orders?

Normal bulk order lead time is 15–25 days, subject to order quantity and surface treatment. We can arrange priority production for urgent projects.

Q4: Is hot dip galvanized coating thicker than zinc plating?

Yes. Hot dip galvanized layer is much thicker, offering far better anti-corrosion performance for harsh outdoor environments.

Q5: Do you provide samples for testing?

Free samples are available, buyers only need to bear the freight cost.