Stainless Steel Flanged Diamond Knurl Cylindrical Insert Nut

Core Features

Diamond Knurl External Surface – The diamond knurl pattern is formed on the cylindrical body and creates an interference fit when pressed into pre-drilled holes. The cross-hatched knurl pattern provides increased surface contact with the host material, enhancing resistance to pull-out and rotational forces.

Stainless Steel Construction – Manufactured from 300 Series stainless steel such as A2 (304) or A4 (316) depending on corrosion resistance requirements. The material provides inherent corrosion resistance without requiring additional plating.

Integrated Flange – A circular flange is formed at one end of the cylindrical body, serving as a positive stop to control insertion depth during installation. The flange provides a load-bearing surface that distributes clamping force across the workpiece.

Internal Threaded Bore – The central bore contains pre-formed internal threads that accept standard bolts or screws, enabling component attachment after the insert nut is installed into the base material.

Product Characteristics

The fastener is manufactured with a cylindrical body and diamond knurling on the external surface. The diamond knurl pattern consists of cross-hatched ridges formed along the length of the body, providing enhanced surface contact with the host material. The outer diameter is dimensioned to provide an interference fit with standard hole sizes in the host material.

The integral flange extends outward from the body at the insertion face. The flange underface provides a bearing surface that contacts the workpiece when the insert is fully seated. The flange thickness and diameter are dimensioned to provide adequate load distribution and resist pull-through forces. An undercut at the flange-base junction is designed to allow the insert to sit flush with the host material.

The internal thread is produced with thread dimensions and tolerances following standard metric thread profiles. Thread classes include 6H for metric specifications. Material composition is controlled to meet specified strength requirements, with stainless steel providing corrosion resistance for wet and outdoor environments. Surface treatment is typically passivation per applicable standards, which removes surface contaminants and enhances the natural corrosion-resistant oxide layer. Alternative finishes such as electropolishing may be available for enhanced surface finish.

Application Scenarios

Plastic Enclosure and Molded Parts – Applied in electronic enclosures, plastic housings, and molded components where stainless steel insert nuts provide threaded receptacles in plastic materials. The diamond knurl increases the retention surface and prevents rotation.

Outdoor and Marine Equipment – Used in applications exposed to moisture, humidity, or salt water where the stainless steel construction supports corrosion resistance requirements.

Food Processing and Medical Equipment – Employed where stainless steel materials are specified for hygiene and corrosion resistance requirements.

Electronics and Precision Equipment – Applied in electronic enclosures and instrument casings where inserts are required for board mounting and mechanical attachments. The flange provides a positive stop for consistent installation depth.

Customization Options

Specifications and configurations can be adjusted based on application requirements. Outer diameter, flange diameter, length, and thread size are customizable according to application geometry. Material grades include A2 (304) stainless steel for general corrosion-resistant applications and A4 (316) for enhanced resistance to salt water and chemicals. Surface treatments include passivation as standard, with electropolishing available for enhanced surface finish. Strength grades can be matched to specific mechanical property criteria.

Frequently Asked Questions

Q: What is the difference between diamond knurl and straight knurl insert nuts?
A: Diamond knurl insert nuts feature a cross-hatched knurl pattern that provides increased surface contact with the host material compared to straight knurl patterns. The diamond pattern creates a more secure interface with the surrounding material for applications requiring higher retention force or resistance to rotation.

Q: What is the purpose of the flange on this insert nut?
A: The flange serves as a positive stop during installation, preventing the insert from being pressed too deeply into the hole. It also provides a bearing surface that distributes clamping force across the workpiece and helps resist pull-through forces under load.

Q: What materials are compatible with these insert nuts?
A: Diamond knurl insert nuts are compatible with plastic, wood, and certain metal applications where the insert is pressed into a pre-drilled hole. The host material should be softer than the insert nut material to allow the knurl ridges to bite into the surrounding material.

Q: What is the difference between A2 (304) and A4 (316) stainless steel?
A: A2 (304) stainless steel provides corrosion resistance for wet and outdoor environments. A4 (316) offers enhanced corrosion resistance for exposure to salt water and most chemicals, providing improved protection in aggressive environments.

Q: Can these nuts be removed after installation?
A: The insert nut is intended for permanent installation. Once pressed into the host material, removal typically damages the surrounding material or the nut itself. For applications requiring removal or replacement, alternative fastening methods should be considered.

Q: What is the recommended installation method?
A: The insert nut is pressed into the hole using a press. Standard drills or drill presses may be used in small production runs, while automatic feeding systems are recommended for large volume production. The flange provides a positive stop for consistent insertion depth.

Installation Considerations

The hole diameter should be dimensioned to provide the specified interference fit with the diamond knurled body. Hole tolerance control is important for achieving consistent insertion force and retention performance. During installation, the insert nut should be aligned with the hole and pressed vertically. Angular misalignment may damage both the insert nut and the host material.

The flange ensures consistent insertion depth when the insert is fully seated against the workpiece surface. When installing into plastic materials, consideration should be given to material flow and potential stress cracking. For applications requiring corrosion resistance, the stainless steel material provides inherent protection without the need for post-installation coating. The passivated surface should be maintained to preserve corrosion resistance.