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Hex nut

Hex nut

The Dorman Hex Nut is a fundamental mechanical fastener characterized by its six-sided internal threading, designed for use in conjunction with bolts, studs, and machine screws. These components are engineered to provide a secure clamping force through the application of torque, facilitating the assembly of automotive and industrial structures. Manufactured from various grades of carbon steel and stainless steel, these hex nuts conform to standardized thread pitches (Metric and SAE) to ensure compatibility across diverse mechanical platforms. The hexagonal geometry allows for efficient tool engagement with standard wrenches and sockets, enabling precise tightening in high-vibration environments. Ningguo Kingcool Import and Export Co., Ltd offers a comprehensive range of these fasteners, ensuring that each unit meets specific dimensional tolerances required for engine, chassis, and heavy machinery applications.
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Fastener Engineering Solutions
Grade 2 / 5 / 8 | A2 / A4

The Dorman Hex Nut is a fundamental mechanical fastener characterized by its six-sided internal threading, designed for use in conjunction with bolts, studs, and machine screws. These components are engineered to provide a secure clamping force through the application of torque, facilitating the assembly of automotive and industrial structures. Manufactured from various grades of carbon steel and stainless steel, these hex nuts conform to standardized thread pitches (Metric and SAE) to ensure compatibility across diverse mechanical platforms. The hexagonal geometry allows for efficient tool engagement with standard wrenches and sockets, enabling precise tightening in high-vibration environments.

M3-M64
thread range
8.8-12.9
property class
ISO 4032
primary standard
mechanical performance

Core Mechanical Advantages

TD
Torque Distribution
The six-sided design provides multiple contact points for tools, minimizing the risk of rounding corners during high-torque applications.
plus 32 percent contact surface
SC
Standardized Compatibility
Produced according to ASME, DIN, and ISO standards, ensuring seamless integration with existing automotive hardware and industrial bolts.
100 percent interchangeability
CR
Corrosion Resistance Options
Available in multiple finishes including zinc plating, black oxide, and chrome to prevent oxidation in moisture-prone environments.
720 hours salt spray
VS
Vibration Stability
When paired with appropriate locking washers or specific torque settings, these nuts maintain axial load and prevent loosening under cyclic stress.
class V approval
engineering data

Technical Product Features

Material Composition
Grade 2, 5, or 8 Carbon Steel; 304/316 Stainless Steel
Thread Type
Fine (UNF) and Coarse (UNC); Metric (M-series)
Surface Treatment
Clear Zinc, Yellow Zinc, Black Oxide, Hot-Dip Galvanized
Hardness Rating
Standardized to Rockwell C scale based on grade
Geometric Form
Hexagonal (6-sided) with chamfered edges
standard reference
DIN 934 ISO 4032 ASME B18.2.2
M6 10mm 5.0mm
M8 13mm 6.5mm
M10 16mm 8.0mm
M12 18mm 10.0mm
industry deployment

Primary Application Scenarios

automotive
Automotive Repair
Securing suspension components, manifold bolts, and wheel assemblies where thermal expansion and vibration occur.
SAE J995 compliant
industrial
Industrial Manufacturing
Assembly of steel frames, conveyor systems, and heavy-duty mechanical equipment.
DIN EN 15048
renewable
Renewable Energy Systems
Fastening solar panel mounting brackets and wind turbine structural elements.
ISO 898-2
electronics
Consumer Electronics and Appliances
Used in internal housing and motor mounting for large household units.
RoHS approved
operational protocol

Maintenance and Usage Guidelines

01 Storage Environment down
Store in a dry, low-humidity warehouse to maintain the integrity of the surface coating. Avoid direct contact with acidic or corrosive chemical vapors. Recommended relative humidity below 55 percent.
02 Thread Inspection down
Verify the thread pitch and diameter match the male fastener before installation. Forced engagement on mismatched threads will lead to mechanical stripping. Use GO/NO-GO gauges for verification.
03 Torque Specifications down
Follow the manufacturer's recommended torque values. Under-tightening leads to vibration loosening, while over-tightening can cause the nut to crack or the bolt to shear. Calibrated tools required.
04 Reusability Note down
For critical safety applications such as steering or braking systems, it is recommended to replace fasteners rather than reusing them to avoid fatigue-related failure.
ASME B18.2.2 DIN 934 ISO 4032 SAE J995
Ningguo Kingcool Import and Export Co., Ltd — technical fastener division

Related Products

Zhejiang Donghe Machinery Technology Co., Ltd.

 

Zhejiang Donghe Machinery Technology Co., Ltd. offer Wholesale Hex nut Manufacturers. Our company passed the ISO9001:2000 quality management certification system standard in 2017 and is an enterprise with self-operating import and export rights.
Our company produces various international industrial standard products, including Chinese GB standards, German DIN standards, American ANSI standards, British B standards, and so on. In addition, our company can customize various non-standard fasteners according to customer requirements. The products are exported to Europe, Australia, Africa, the United States, and other regions. We always provide customers with good product and technical support, and sound after-sales service.

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