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Hex Nut China Manufacturer
QS Fastener: Hex Nut China Manufacturer
Name: Hex Nut China Manufacturer
Dimension: 1-1/4 IN
Material: ASTM A194 2H, Alloy Steel
Type: Heavy Hex Nut
Standard: API 20E
Surface Treatment: Zinc and Bichromated
Dimension: 1-1/4 IN
Material: ASTM A194 2H, Alloy Steel
Type: Heavy Hex Nut
Standard: API 20E
Surface Treatment: Zinc and Bichromated
Quantity
The 1-1/4 IN Heavy Hex Nut, manufactured from ASTM A194 2H alloy steel, represents a critical fastening component for high-integrity bolted connections. As a trusted Hex Nut China Manufacturer, we produce this heavy-pattern nut to meet the demanding mechanical and environmental requirements of upstream, midstream, and downstream oil and gas operations. Its nominal size of 1‑1/4 inches, combined with a heavy hex geometry, delivers a larger bearing area and greater corner clearance than standard hex nuts, significantly improving wrench engagement and reducing the risk of rounding during make‑up.
Material & Performance
The choice of ASTM A194 2H material ensures a minimum tensile strength of 150,000 psi, making this nut suitable for high-pressure vessel flanges, valve bonnets, pipeline connectors, and subsea equipment. The alloy steel chemistry provides consistent hardenability, while the heavy hex design distributes clamping force more evenly over the joint, minimizing gasket creep and flange distortion. Each batch is produced under strict quality control, with dimensional verification to ASME B18.2.2 and full traceability from melting to final packaging – a hallmark of any responsible Hex Nut China Manufacturer serving global energy projects.
The choice of ASTM A194 2H material ensures a minimum tensile strength of 150,000 psi, making this nut suitable for high-pressure vessel flanges, valve bonnets, pipeline connectors, and subsea equipment. The alloy steel chemistry provides consistent hardenability, while the heavy hex design distributes clamping force more evenly over the joint, minimizing gasket creep and flange distortion. Each batch is produced under strict quality control, with dimensional verification to ASME B18.2.2 and full traceability from melting to final packaging – a hallmark of any responsible Hex Nut China Manufacturer serving global energy projects.
Compliance with API 20E
This nut is fully compliant with API 20E – the industry specification that governs bolting materials for use in sour service and other corrosive well environments. API 20E mandates rigorous testing, including hardness control, Charpy impact testing, and resistance to sulfide stress cracking (SSC). By sourcing from a qualified Hex Nut China Manufacturer with API‑compliant processes, end‑users gain assurance that each nut meets the notch‑toughness and ductility requirements essential for offshore platforms, refineries, and gas processing plants, where unexpected failure is not an option.
This nut is fully compliant with API 20E – the industry specification that governs bolting materials for use in sour service and other corrosive well environments. API 20E mandates rigorous testing, including hardness control, Charpy impact testing, and resistance to sulfide stress cracking (SSC). By sourcing from a qualified Hex Nut China Manufacturer with API‑compliant processes, end‑users gain assurance that each nut meets the notch‑toughness and ductility requirements essential for offshore platforms, refineries, and gas processing plants, where unexpected failure is not an option.
Surface Treatment – Zinc & Dichromate
To combat corrosion in coastal, humid, or chemical‑laden atmospheres, the nuts are finished with a zinc plating followed by a dichromate conversion coating. The zinc layer provides sacrificial cathodic protection; the dichromate topcoat seals the surface, enhancing salt‑spray resistance and extending service life in temperatures ranging from ‑50°F to +400°F. This duplex coating also reduces galling during assembly, a common concern with bare alloy steels. For a Hex Nut China Manufacturer exporting to North Sea, Middle East, or Gulf of Mexico projects, this finish is a cost‑effective alternative to hot‑dip galvanizing, while still offering excellent thread lubricity.
To combat corrosion in coastal, humid, or chemical‑laden atmospheres, the nuts are finished with a zinc plating followed by a dichromate conversion coating. The zinc layer provides sacrificial cathodic protection; the dichromate topcoat seals the surface, enhancing salt‑spray resistance and extending service life in temperatures ranging from ‑50°F to +400°F. This duplex coating also reduces galling during assembly, a common concern with bare alloy steels. For a Hex Nut China Manufacturer exporting to North Sea, Middle East, or Gulf of Mexico projects, this finish is a cost‑effective alternative to hot‑dip galvanizing, while still offering excellent thread lubricity.
Application Scenarios
Typical applications include:
- Flanged connections in API 6A gate valves, Christmas trees, and wellhead housings.
- Pressure‑retaining joints in heat exchangers, separators, and pig launchers.
- Structural supports for pipe racks, modules, and compressor skids.
- Retrofit and maintenance of aging refinery units where original bolting requires replacement with higher‑strength materials.
Typical applications include:
- Flanged connections in API 6A gate valves, Christmas trees, and wellhead housings.
- Pressure‑retaining joints in heat exchangers, separators, and pig launchers.
- Structural supports for pipe racks, modules, and compressor skids.
- Retrofit and maintenance of aging refinery units where original bolting requires replacement with higher‑strength materials.
The 1‑1/4 IN size is widely used with matching heavy hex screws or stud bolts, providing a balanced torque‑tension relationship that simplifies hydraulic tensioning or torque‑wrench calibration.
Why Choose This Hex Nut China Manufacturer
- Full traceability – heat codes stamped and documented per EN 10204 3.1.
- Short lead times – large stock inventory and flexible production capacity.
- Third‑party testing – available upon request (SGS, BV, DNV, or customer‑witnessed).
- Cost efficiency – without compromising on mechanical properties or coating adhesion.
- Full traceability – heat codes stamped and documented per EN 10204 3.1.
- Short lead times – large stock inventory and flexible production capacity.
- Third‑party testing – available upon request (SGS, BV, DNV, or customer‑witnessed).
- Cost efficiency – without compromising on mechanical properties or coating adhesion.
Summary
In summary, the 1‑1/4 IN ASTM A194 2H Heavy Hex Nut with zinc‑dichromate finish offers a robust, code‑compliant fastening solution for severe‑service oil and gas applications. Its heavy hex profile, high tensile strength, API 20E certification, and proven corrosion protection make it a dependable choice for engineers and procurement specialists. When you partner with a reputable Hex Nut China Manufacturer, you gain not only a quality component but also consistent quality, competitive pricing, and global logistics support – ensuring your project stays on schedule and within budget.
In summary, the 1‑1/4 IN ASTM A194 2H Heavy Hex Nut with zinc‑dichromate finish offers a robust, code‑compliant fastening solution for severe‑service oil and gas applications. Its heavy hex profile, high tensile strength, API 20E certification, and proven corrosion protection make it a dependable choice for engineers and procurement specialists. When you partner with a reputable Hex Nut China Manufacturer, you gain not only a quality component but also consistent quality, competitive pricing, and global logistics support – ensuring your project stays on schedule and within budget.
For critical bolting where safety and reliability are paramount, this nut delivers the performance you can trust, joint after joint.
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