Custom Flat Knurled Nut Designed for Versatile Use in 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

Flat Head Knurled Nut Overview

1. Definition and Structural Features

The flat head rolling nut is an ingeniously crafted fastener, intricately composed of key structural elements that define its superior functionality:

Flat Head Design: Featuring a sleek, flat surface at the top, this design diverges from the traditional convex style of hex nuts. It ensures a snug fit with the workpiece surface, optimizing space utilization and minimizing interference with adjacent components.

Rolling Pattern: Crafted with precision, the nut's exterior is adorned with uniform raised patterns—be it straight lines, mesh, or diamonds. These are achieved through advanced cold extrusion or rolling techniques, dramatically enhancing friction.

Internal Thread Structure: Meticulously processed to feature standard threads such as M3, M4, etc., this structure seamlessly pairs with bolts or studs to facilitate secure mechanical connections.

2. Core Functional Features

Anti-Loosening Performance: The interaction of the rolling pattern with fingers or tools bolsters the tightening torque through friction, significantly mitigating the risk of loosening in vibrational environments.

Tool-Free Installation: Designed for efficiency, it can be hand-tightened (with enhanced results using specialized rolling tools), ideal for scenarios demanding swift assembly or maintenance.

Low Height Design: The flat head design results in a lower overall height than hexagonal nuts, offering a distinct edge in thin-walled components or confined spaces.

High-Strength Materials: Typically constructed from robust carbon steel (e.g., C1022), stainless steel (e.g., 304/316), or copper alloys, with surface options like galvanization, nickel plating, or blackening to bolster corrosion resistance.

3. Typical Application Scenarios

Electronic Devices: Essential for securing PCB boards and chassis shells, mitigating the threat of circuit deformation or short circuits caused by protruding traditional nuts.

Precision Instruments: Perfect for replacing hex nuts in optical and medical devices, reducing spatial demands and simplifying disassembly.

Automotive Industry: Ideal for non-load-bearing elements like interior parts and wire harness attachments, balancing between fastening needs and lightweight construction.

Furniture Manufacturing: Perfect for cabinet door hinges, drawer slides, and other parts, offering a blend of style and functionality.

4. Key Technical Parameters

Thread Specifications: Spanning metric standards from M2 to M12, with select customized models accommodating imperial systems (e.g., UNC/UNF).

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

Torque Requirement: Installation torque varies based on material and rolling pattern type. Generally recommended at 70%-85% of standard hex nut values.

• Surface Treatment Options:

Galvanized (white/blue zinc): Enhances salt spray resistance to 48-96 hours.

• Passivation Treatment: Boosts resistance to pitting corrosion in stainless steel models.

Dacromet Coating: Tailored for heavy-duty anti-corrosion needs (e.g., ship equipment).

5. Selection Precautions

• Load Capacity: The flat head design presents slightly reduced shear resistance compared to hex nuts, requiring verification based on static/dynamic loads.

Installation Tools: Electric/pneumatic tools with a roller flower adapter head are recommended. Anti-slip gloves are advisable for manual handling.

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