Versatile Flat Knurled Nut Perfect for Automotive and Solar Industries

• 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

Flat Head Knurled Nut: A Comprehensive Overview

1. Definition and Structural Features

The Flat Head Rolling Nut is a meticulously engineered fastener, boasting a sophisticated core structure comprised of these essential elements:

Flat Head Design: Featuring a sleek, flat top, this design diverges from the traditional hex nut's convex head. It seamlessly integrates with the surface of the workpiece, minimizing spatial consumption and preventing interference with adjacent components.

Rolling Pattern: The nut's exterior is embellished with uniform raised patterns, including straight lines, mesh textures, or diamonds. These patterns are crafted through advanced cold extrusion or rolling processes, greatly enhancing friction.

Internal Thread Structure: Equipped with standardized internal threads (like M3, M4), these nuts pair flawlessly with bolts or studs, ensuring a secure mechanical connection.

2. Core Functional Features

Anti-Loosening Performance: The unique rolling pattern engages with fingers or tools, augmenting tightening torque via friction, thus mitigating loosening risks in vibrational settings.

Tool-Free Installation: This nut can be effortlessly tightened by hand, with optional specialized rolling tools for optimal results, making it ideal for rapid assembly or maintenance scenarios.

Low Height Design: The flat head contributes to a reduced overall height compared to hexagonal nuts, providing an advantage in applications involving thin-walled parts or constrained spaces.

High-Strength Materials: Typically crafted from robust materials such as carbon steel (C1022), stainless steel (304/316), or copper alloys, these nuts can be galvanized, nickel-plated, or blackened to boost corrosion resistance.

3. Typical Application Scenarios

Electronic Devices: Employed to secure PCB boards and chassis shells, eliminating risks of circuit board deformation or short circuits caused by traditional nut protrusions.

Precision Instruments: Supplanting hex nuts in optical equipment and medical devices, these nuts reduce space consumption while simplifying disassembly.

Automotive Industry: Applied in non-load-bearing components like interior parts and wire harness fastenings, these nuts balance fastening demands with a lightweight design.

Furniture Manufacturing: Used in cabinet door hinges, drawer slides, and various parts, these nuts harmonize aesthetics with functionality.

4. Key Technical Parameters

Thread Specifications: Available in a broad range, covering metric standards like M2 to M12, with select models offering support for imperial systems such as UNC/UNF.

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

Torque Requirement: Installation torque must be tailored to the material and rolling pattern type, with a recommended range of 70%-85% of a standard hex nut.

• Surface Treatment Options:

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

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

Dacromet Coating: Ideal for heavy-duty anti-corrosion applications, such as marine equipment.

5. Selection Precautions

• Load Capacity: The flat head structure offers slightly reduced shear resistance compared to hex nuts, requiring verification against static/dynamic loads.

Installation Tools: Electric/pneumatic tools with a roller flower adapter head are recommended, and anti-slip gloves should be worn during manual operations.

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