Precision Flat Knurled Nut for Reliable Hand-Tightened Applications

• Customization: Available
• Material: Stainless Steel
• Type: Round Head
• Model NO.: 1-1
• Connection: Common Bolt
• Head Style: Round
• Standard: DIN
• Grade: 6.8
• Applicable Industries: Automobile Manufacturing, Solar Power Generation
• Use: Anti-Loosening
• Surface Treatment: True Color
• Whether to Support Customization: Support
• Transport Package: Container
• Specification: 1-30
• Trademark: Huilin
• Origin: Handan, Hebei
• HS Code: 0101101010
• Production Capacity: 50000

Product Description

Exquisite Overview of the Flat Head Knurled Nut

1. Comprehensive Definition and Distinctive Structural Characteristics

The flat head rolling nut is an ingeniously crafted fastener, meticulously designed with a core structure comprising the following elements:

Flat Head Design: Featuring a sleek, flat top, distinct from traditional convex hex nuts, this design ensures seamless integration with the workpiece surface, optimizing space utilization and mitigating interference with adjacent components.

Rolling Pattern: Adorned with aesthetically pleasing, regularly raised patterns such as straight lines, mesh, or diamonds, crafted through advanced cold extrusion or rolling techniques, these patterns notably amplify friction.

Internal Thread Structure: Expertly processed with standard threads (like M3, M4, etc.), these threads seamlessly align with bolts/studs for robust mechanical connectivity.

2. Paramount Functional Features

Anti-Loosening Performance: The contact between the rolling pattern and fingers/tools enhances tightening torque through friction, significantly reducing the risk of loosening in dynamic, vibration-prone environments.

Tool-Free Installation: Capable of being hand-tightened, with specialized rolling tools for enhanced results, this feature is ideal for scenarios demanding swift assembly or maintenance.

Low Height Design: The flat head structure offers a lower overall height compared to hex nuts, providing a distinct advantage in thin-walled parts or densely packed spaces.

High-Strength Materials: Crafted from durable materials such as carbon steel (C1022), stainless steel (304/316), or copper alloy, these nuts can be galvanized, nickel-plated, or blackened to bolster corrosion resistance.

3. Typical Application Scenarios

Electronic Devices: Employed to securely affix PCB boards, chassis shells, etc., preventing risks like circuit board deformation or short circuits caused by traditional nut protrusions.

Precision Instruments: A superior alternative to hex nuts in optical equipment and medical devices, reducing space usage while easing disassembly.

Automotive Industry: Perfect for non-load-bearing components such as interior parts and wire harness fixtures, harmonizing fastening needs with lightweight design goals.

Furniture Manufacturing: Utilized in cabinet door hinges, drawer slides, and other parts, skillfully balancing aesthetics with functionality.

4. Key Technical Parameters

Thread Specifications: Encompassing metric standards from M2 to M12, with certain custom models supporting imperial systems like UNC/UNF.

• Height Range: The flat head's thickness typically ranges from 0.5-0.8 times the nominal thread diameter (e.g., M4 nut height approximately 2-3.2mm).

Torque Requirement: Installation torque must be calibrated based on material and rolling pattern type, with a recommended value generally at 70%-85% of standard hex nut values.

• Surface Treatment Options:

Galvanized (White Zinc/Blue Zinc): Enhances salt spray resistance, ensuring durability for 48-96 hours.

• Passivation Treatment: Augments the pitting corrosion resistance of stainless steel models.

Dacromet Coating: Ideal for robust anti-corrosion needs, such as in marine equipment.

5. Selection Precautions

• Load Capacity: The flat head design implies slightly reduced shear resistance compared to hex nuts, necessitating thorough verification against static/dynamic loads.

Installation Tools: For optimal results, electric/pneumatic tools with roller flower adapter heads are recommended, alongside anti-slip gloves for manual operations.

Environmental Compatibility: For high-temperature (>150 ºC) or highly corrosive environments, select special alloys (like Inconel 718) or advanced ceramic coatings.