High-Precision Double-Section Diamond-Knurled Brass Insert Nut

Product Specifications

Material	Brass
Surface Treatment	Cleaning
Outer Diameter	5 mm
Total Length	12 mm
Process	CNC turning
Thread Type	Internal thread at both ends
Knurl Type	Two sections of diamond knurling, with a central relief groove
Price	Please contact us for current pricing.
Customization	Non-standard outer diameter, length, thread size, groove dimensions, and knurl pattern are available upon request.

Core Advantages

• Double-section diamond knurling: Two cross-hatch knurled bands engage the plastic in multiple directions and provide several contact zones within the thermoplastic.
• Central relief groove: The groove separates the two knurled sections and can accommodate a matching feature in the molded hole, supporting positioning during installation.
• Double-end internal thread: Internal threads at both ends allow fastening from either side of the insert and suit through-connection layouts in plastic assemblies.
• Anti-pull-out geometry: The knurled sections create mechanical interlock with the plastic after molding or heat staking.
• CNC turning: The machining process holds consistent dimensional tolerance on outer diameter, length, and both internal threads.
• Brass construction: Brass offers thermal conductivity and corrosion resistance in typical indoor environments, and is compatible with common molding and heat-staking processes.
• Cleaned surface: The cleaning treatment removes machining residue and prepares the surface for consistent insertion behavior.
• Extended length: The 12 mm total length suits deeper bosses and provides a longer engagement depth.

Product Features

• Two sections of diamond knurling along the body, with a central relief groove.
• Double-end internal thread configuration.
• Machined brass body with consistent dimensional tolerance.
• Outer diameter of 5 mm and total length of 12 mm.
• Cleaning surface treatment for removal of cutting fluid and fine particles.
• Suitable for insert molding, heat staking, ultrasonic insertion, and press-fit.
• Can be produced to customer drawings for non-standard dimensions and groove geometry.

Applications

• Consumer electronics housings and enclosures
• Small electronic device casings
• Automotive interior plastic components
• Industrial control panels and instrument casings
• Medical device plastic housings
• Telecommunications equipment
• Prototype and low-volume molded assemblies
• Thermoplastic parts requiring fastening from both sides

FAQ and Solutions

Q1: What is the function of the central relief groove?
A: The groove separates the two knurled sections and can accommodate a matching feature in the molded hole. This supports positioning during installation and provides a defined transition between the two knurled bands.

Q2: How is this insert installed?
A: It can be installed by insert molding, heat staking, ultrasonic insertion, or press-fit, depending on the plastic type and wall thickness. Heat staking is commonly used for thermoplastics because the melted plastic flows into the knurl and resets around it.

Q3: What is the purpose of the double-end internal thread?
A: Internal threads at both ends allow fasteners to be inserted from either side of the insert. This suits through-connection layouts where components are fixed on both faces of a plastic part.

Q4: What information is needed for a custom quote?
A: Please provide outer diameter, total length, thread size at each end, knurl type, groove dimensions, material, surface treatment, quantity, and any drawing or tolerance requirements.

Precautions

• Confirm the molded hole diameter, groove dimensions, and boss wall thickness before installation.
• Use installation parameters recommended for the specific plastic material.
• Avoid excessive heat during heat staking, which can deform the surrounding plastic.
• Store in a dry environment to limit surface oxidation.
• Verify thread compatibility at both ends with the mating screws before assembly.
• For high-torque applications, test the insert in the actual plastic to confirm performance.

Customization and Ordering

Non-standard brass embedded nuts can be produced according to customer drawings or samples. Customization options include outer diameter, length, thread size at each end, knurl type, groove dimensions, material, surface treatment, and chamfer. Please contact us with your specifications and application details for a quotation.

Details