High-Quality Flat Knurled Nut with True Color Surface Treatment Features

• 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 Description of the Flat Head Knurled Nut

1. Definition and Structural Elegance

The flat head rolling nut is a masterfully engineered fastener, thoughtfully designed with core structural elements as follows:

Flat Head Design: Featuring a sleek, flat top structure, this design stands apart from the protruding convex head of traditional hex nuts. It ensures a snug fit with the workpiece surface, minimizes space utilization, and prevents interference with adjacent components.

Rolling Pattern: Adorning the nut's outer surface are meticulously crafted raised patterns—straight lines, mesh designs, or diamonds—skillfully created through cold extrusion or rolling processes to dramatically enhance friction.

Internal Thread Structure: Precision-crafted internal threads (standard sizes like M3, M4, etc.) seamlessly pair with bolts/studs for a robust mechanical connection.

2. Core Functional Mastery

Anti-Loosening Prowess: The rolling pattern interacts with fingers/tools, amplifying tightening torque through enhanced friction, substantially reducing the risk of loosening even in vibratory environments.

Tool-Free Installation: Effortlessly tightened by hand, it’s perfect for scenarios demanding rapid assembly or maintenance (specialized rolling tools can augment the results).

Low Height Design: The flat head configuration results in a reduced overall height compared to hexagonal nuts, offering superior advantages in thin-walled or compact spaces.

High-Strength Materials: Typically crafted from premium carbon steel (e.g., C1022), stainless steel (304/316), or copper alloy, with surfaces enhanced by galvanization, nickel plating, or blackening to boost corrosion resistance.

3. Typical Application Scenarios

Electronic Marvels: Secure PCB boards, chassis shells, and more, mitigating risks of circuit board deformation or short circuits caused by protruding traditional nuts.

Precision Instruments: Substitute for hex nuts in optical and medical devices, optimizing space usage and simplifying disassembly.

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

Furniture Manufacturing: Perfect for cabinet door hinges, drawer slides, and beyond, harmonizing aesthetics with functionality.

4. Key Technical Parameters

Thread Specifications: Embracing metric standards from M2 to M12, with select models offering support for imperial systems (e.g., UNC/UNF).

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

Torque Requirement: Installation torque should align with material and rolling pattern type; recommended values range from 70% to 85% of standard hex nut specifications.

• Surface Treatment Options:

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

• Passivation Treatment: Stainless steel models achieve heightened resistance to pitting corrosion.

Dacromet Coating: Optimal for heavy-duty anti-corrosion applications (e.g., maritime equipment).

5. Selection Precautions

• Load Capacity: The flat head design inherently offers slightly lower shear resistance than hexagonal nuts, necessitating verification based on static/dynamic load requirements.

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

Environmental Compatibility: Opt for special alloys (e.g., Inconel 718) or ceramic coatings for high-temperature (>150 ºC) or highly corrosive conditions.