Hand-Tightened Nut for Optimal Anti-Loosening in Automotive Manufacturing

• 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

Elegant Overview of Flat Head Knurled Nut

1. Definition and Exquisite Structural Features

The Flat Head Rolling Nut, an ingeniously crafted fastener, boasts a core structure enriched with these elements:

Flat Head Design: The top features a smooth, flat structure, distinct from traditional hex nuts' convex heads. This allows for seamless fitting with workpiece surfaces, minimizes space occupation, and prevents interference with surrounding components.

Rolling Pattern: Adorned with meticulously designed raised patterns like straight lines, mesh, or diamonds, crafted via cold extrusion or rolling to significantly enhance friction.

Internal Thread Structure: Equipped with standard internal threads (such as M3, M4, etc.), aligning perfectly with bolts/studs to ensure robust mechanical connections.

2. Core Functional Marvels

Anti-Loosening Prowess: When the rolling pattern encounters fingers/tools, friction boosts the tightening torque, reducing loosening risks in vibration-prone environments.

Tool-Free Installation: Hand-tightening is a breeze (though specialized rolling tools can enhance results), ideal for scenarios demanding swift assembly or maintenance.

Low Profile Design: The flat head structure ensures a lower overall height than a hexagonal nut, perfect for thin-walled or compact spaces.

High-Strength Materials: Crafted from robust carbon steel (like C1022), stainless steel (such as 304/316), or copper alloy, with finishes like galvanization, nickel plating, or blackening to boost corrosion resistance.

3. Typical Application Scenarios

Electronic Devices: Secure PCB boards and chassis enclosures, mitigating risks of circuit deformations or short circuits caused by traditional nut protrusions.

Precision Instruments: Replace hex nuts in optical equipment and medical devices, optimizing space usage and easing disassembly.

Automotive Industry: Ideal for non-load-bearing parts like interior components and wire harness fixings, perfectly balancing fastening needs and lightweight design.

Furniture Manufacturing: Perfect for cabinet door hinges, drawer slides, and more, striking a balance between aesthetic appeal and functionality.

4. Key Technical Parameters

Thread Specifications: Encompasses metric standards from M2 to M12, with select customized models supporting imperial systems (such as UNC/UNF).

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

Torque Requirement: Installation torque varies by material and rolling pattern type. We recommend 70% -85% of the standard hex nut value.

• Surface Treatment Options:

Galvanized (White Zinc/Blue Zinc): Enhances salt spray resistance from 48 up to 96 hours.

• Passivation Treatment: Stainless steel versions can boost their resistance to pitting corrosion.

Dacromet Coating: Perfect for heavy-duty anti-corrosion environments (like ship equipment).

5. Selection Precautions

• Load Capacity: The flat head structure offers slightly less shear resistance than hexagonal nuts, necessitating verification based on static/dynamic loads.

Installation Tools: Electric/pneumatic tools with a roller flower adapter head are recommended, and anti-slip gloves are advised for manual handling.

Environmental Compatibility: For high temperatures (>150 ºC) or corrosive settings, opt for special alloys (like Inconel 718) or ceramic coatings.