Flat Head Vertical Knurled Rivet Nut

Wanluo is a reliable Flat Head Vertical Knurled Rivet Nut. It features a flat head base and an outer wall with vertical ridges for anti-slip purposes. After installation, it can fully sink into the surface of the workpiece, achieving a flush assembly with no protrusions or interference. It is suitable for various precision assembly scenarios that require a smooth appearance and concealed fastening, and is a core supporting component for sheet metal processing, lightweight structure assembly, and non-welding assembly projects.

Manufacturing Process

1. High-precision raw material selection and pre-treatment

Select high-quality raw materials such as aluminum alloy, carbon steel, and stainless steel based on the operating conditions. After the raw materials arrive, they undergo material testing, straightening, and deoxidation treatment. Impurities, deformities, and uneven thickness are eliminated. This ensures the consistency of the product structure and the stability of the material.

2. Integrated cold forging process

The Flat Head Vertical Knurled Rivet Nut is formed through precise integrated cold forging technology in one step. No secondary welding or splicing is required, resulting in uniform overall wall thickness and a dense structure of the nut. This avoids structural gaps and strength shortcomings caused by traditional processing, significantly enhancing the overall performance in terms of pressure resistance and tensile strength.

3. Outer wall vertical ribbing processing

The uniform vertical straight ribbing pattern is processed using a dedicated ribbing machine. The depth and distribution of the ribbing are consistent, and the roughness of the ribbing is precisely controlled to ensure a good fit with the plate hole wall during subsequent assembly, achieving the core effect of anti-rotation and anti-slip.

4. Precision thread rolling internal processing

Professional thread rolling technology is used to precisely process the internal threads, replacing the traditional turning processing method. The tooth shape is full and regular, the tooth pitch is uniformly standard, and the inner wall of the thread is smooth without burrs, ensuring the precise and non-slipping performance of the bolt after multiple disassembly and assembly.

5. Fine shaping and deburring treatment

After forming, the flat head surface, thread end, and edge corners are polished and shaped in all directions to remove the remaining burrs and sharp edges, ensuring the assembly fit, and avoiding scratches on the workpiece and affecting the installation flatness.

6. Corrosion protection and quality inspection

Corrosion protection treatments such as rust prevention, passivation, and electroplating are carried out according to the material to enhance the product's weather resistance. Finally, the dimensions, thread compatibility, and pressure deformation performance are inspected in batches. Products that meet the standards are stored and shipped, conforming to the standards for industrial batch assembly.

Product features

1. Concealed flush assembly, no structural interference

2. Vertical pattern anti-slip and anti-rotation, more stable locking

3. No need for welding and tapping, high assembly efficiency

4. Precise threads for perfect fit, supports repeated disassembly and assembly

5. Excellent anti-pull and anti-bending performance, suitable for thin-walled conditions

6. Multiple material options, suitable for all scenarios

Structural Features & Manufacturing Technology

The flat head vertical knurled rivet nut adopts integral precision cold forging and thread rolling forming process, consisting of flat countersunk head, vertical straight knurl anti-slip body and standard internal thread section. The smooth flat head ensures zero protrusion after installation, realizing seamless flush assembly and avoiding structural interference. The uniformly distributed vertical knurling texture greatly enhances the friction coefficient between the nut body and the plate hole wall, effectively preventing rotation and slipping during bolt locking and long-term vibration operation. The precision rolled internal thread features smooth tooth profile, high matching accuracy and strong load-bearing capacity, ensuring repeated disassembly and locking stability. Made of high-quality aluminum alloy, carbon steel and stainless steel raw materials, all products undergo strict shaping treatment, surface deburring and anti-corrosion protection. The overall structure has uniform wall thickness, excellent compression deformation stability and fatigue resistance, perfectly adapting to batch industrial assembly and long-term stable fastening requirements.

Core Selling Points

FAQ

Q1: What is the difference between knurled rivet nuts and ordinary blind rivets? 

A1: Blind rivets only provide squeezing fixation without threaded function and cannot be disassembled and connected with bolts; flat head knurled rivet nuts can form standard internal threads on thin plates, supporting repeated bolt disassembly and locking, with anti-rotation and thread reinforcement functions.

Q2: What is the advantage of vertical knurl compared with horizontal knurl? 

A2: Vertical straight knurling is more conducive to in-place pressing and deformation during installation, with stronger axial anti-rotation ability. It is not easy to idle and slip during bolt locking, featuring higher locking stability and stronger pull-out resistance.

Q3: Is the flat head design suitable for surface finishing scenarios? 

A3: Yes. The flat countersunk head can be completely sunk into the plate surface after installation with zero protrusion and seamless fitting. It is the best choice for equipment shells, decorative surfaces and parts requiring flat assembly.

Q4: Can rivet nuts be used repeatedly? 

A4: The rivet nut body is permanently locked on the plate after installation and will not fall off or rotate. The matched bolts can be disassembled and locked repeatedly, realizing flexible secondary assembly and maintenance.

Q5: Can special thread sizes and lengths be customized? 

A5: Yes. We support customizing non-standard thread specifications, thickened reinforced bodies, special knurl depth and high weather-resistant surface treatments to meet personalized industrial assembly requirements.