ASTM A194 2H Heavy Hex Nut

ASTM A194 2H Heavy Hex Nuts: High-Performance Fasteners for Extreme Conditions

Powering critical connections in oil refineries, power plants, and heavy machinery since 2008, Xi 'An QinSteel Trading Co., Ltd delivers ASTM A194 2H Heavy Hex Nuts engineered for reliability under 450°C heat and 100+ MPa pressure. Our nuts combine ASME B18.2.2 compliance with customizable coatings, serving global manufacturers who demand zero-defect fasteners for mission-critical assemblies.

Product Overview

Specially designed to pair with ASTM A193 B7 bolts, these heavy hex nuts feature a 20% thicker profile than standard hex nuts for superior load distribution. Available in sizes from M5 to M100 (5/16” to 4”), they’re the preferred choice for:

• High-pressure flange connections
• Thermal cycling environments
• Vibration-prone equipment

Key Material Properties

Why Our ASTM A194 2H Nuts Outperform?

1. Thermal Stability Guaranteed

Our proprietary quenching process ensures uniform hardness (HRC 22-34) even after prolonged exposure to 450°C heat—critical for turbine flange connections in power plants.

2. Vibration Resistance

3. Corrosion Defense Options

Choose from seven protective finishes:

• Hot-Dip Galvanized: 85µm coating thickness for coastal environments
• Xylan® 1424: FDA-compliant coating for chemical plants
• Phosphate & Oil: Cost-effective rust prevention

4. Batch Consistency

Every lot undergoes:

• 100% magnetic particle inspection (MPI)
• Spectrometer chemical analysis
• Tensile testing (≥120 ksi proof load)

Industry-Specific Solutions

Power Generation Equipment

• Thermal Cycling Nuts: Pre-tested for 5,000+ heat-cool cycles
• Anti-Galling Variants: Molybdenum-disulfide coated nuts for valve assemblies
• Emergency Kits: M64-M100 nuts shipped within 24hrs for outage repairs

Heavy Machinery Manufacturing

• Oversized Nuts (1.5”-4”): For agricultural and construction equipment
• Pre-Assembled Kits: Nuts paired with ASTM A449 bolts/washers
• Anti-Seize Models: Graphite-impregnated threads for easy disassembly

Global Compliance Made Simple

We simplify cross-border procurement with:

• Full Documentation: Material Test Certificates (MTCs), PED 2014/68/EU reports
• Dual Certification: Meets both ASME and EN 10269 standards
• NACE MR0175 Options: For sour gas service applications

Trusted by Industry Leaders

With 1,500+ metric tons in stock and 28 automated production lines, we guarantee:

• 24hr Dispatch: For all standard sizes
• Custom Finishes: Applied within 72hrs
• API Integration: Real-time inventory tracking for OEMs

Quality Control

Factory Equipment

Shipping Packaging

FAQ

Q: Can you supply ASTM A194 2H nuts for EU offshore wind projects?

A: Yes—our nuts comply with PED 2014/68/EU and come with RoHS/REACH documentation.

Q: What’s your lead time for custom Xylan-coated nuts?

A: 7-10 days for orders above 5,000 units. Expedited shipping available.

Q: How do you prevent corrosion during sea transport?

A: We use VCI film + desiccant packs in IP67-rated containers.

Q: Do you provide torque-tension charts?

A: Yes—download technical specs or request engineer support.

Q: MOQ for black oxide nuts?

A: No minimum—order 50 or 50,000 units.

Contact Us

Need ASTM A194 2H Heavy Hex Nuts That Withstand Extreme Conditions?

Email technical specs to info@sxqinsteel.com for:

• Same-day pricing
• Free sample coordination
• Custom coating recommendations

Serving Siemens Energy, CNPC, and 120+ OEMs worldwide.