Brass Embedded Nut with Straight Knurling on Both Ends

Product Specifications

YY00097 — Material: Brass; Surface Treatment: Cleaning; Outer Diameter: 4.2 mm; Total Length: 7.0 mm; Thread: M2.5.

YY00056 — Material: Brass; Surface Treatment: Cleaning; Outer Diameter: 4.6 mm; Total Length: 7.0 mm; Thread: M3.

YY00096 — Material: Brass; Surface Treatment: Cleaning; Outer Diameter: 5.0 mm; Total Length: 8.0 mm; Thread: M3.

YY00234 — Material: Brass; Surface Treatment: Cleaning; Outer Diameter: 6.0 mm; Total Length: 8.0 mm; Thread: M4.

Price: Please contact us for current pricing.

Customization: Non-standard dimensions, threads, knurl types, and materials are available upon request.

 Core Advantages

• Double-end straight knurling: Both ends carry a straight knurl band, which increases contact area with the plastic and resists rotational movement under torque.
• Anti-pull-out geometry: The knurled sections create mechanical interlock with the surrounding plastic after molding or heat staking.
• Brass construction: Brass offers thermal conductivity, corrosion resistance in typical indoor environments, and compatibility with common molding processes.
• Cleaned surface: The cleaning process removes machining residue and prepares the surface for consistent bonding or insertion.
• Metric thread range: M2.5, M3, and M4 internal threads cover common fastening requirements in small electronics and precision assemblies.
• Non-standard customization: Outer diameter, length, thread size, and knurl pattern can be adjusted to match specific housing designs.

Product Features

• Straight knurl on both ends, with a smooth central section between the knurled bands.
• Machined brass body with consistent dimensional tolerance.
• Internal metric thread produced to standard pitch.
• Available in outer diameters from 4.2 mm to 6.0 mm.
• Total lengths of 7.0 mm and 8.0 mm in the standard range.
• Surface cleaning treatment for removal of cutting fluid and fine particles.
• Suitable for press-fit, heat-staking, and insert-molding processes.
• RoHS-related material options can be discussed based on project requirements.

Applications

• Consumer electronics housings and enclosures
• Automotive interior plastic components
• Industrial control panels and instrument casings
• Medical device plastic housings
• Telecommunications equipment
• Power tool and appliance plastic parts
• 3D-printed and machined prototype assemblies requiring threaded inserts
• Any thermoplastic assembly requiring repeated fastening and disassembly

FAQ and Solutions

Q1: What is the difference between double-end knurling and single-end knurling?
A: Double-end knurling provides two engagement zones within the plastic, which can improve torque resistance compared with a single knurled band. It is often used where the insert is subjected to both rotational and axial loads.

Q2: Which installation method is recommended?
A: The insert can be installed by 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: How do I choose the correct outer diameter?
A: The outer diameter should match the molded hole size recommended for the specific plastic and installation method. A hole that is too small may crack the boss; a hole that is too large may reduce pull-out resistance.

Q4: Can the thread size be customized?
A: Yes. Non-standard threads, including different metric sizes and pitches, can be produced on request.

Q5: What is the purpose of the cleaning treatment?
A: Cleaning removes machining oils, chips, and surface contamination. This supports consistent insertion behavior and reduces the risk of contamination in the final assembly.

Q6: Are these inserts suitable for outdoor applications?
A: Brass provides moderate corrosion resistance, but outdoor or high-humidity environments may require additional surface treatment or material selection. Please confirm the operating conditions with us.

Q7: What information is needed for a custom quote?
A: Please provide outer diameter, total length, thread size, knurl type, material, surface treatment, quantity, and any drawing or tolerance requirements.

Precautions

• Confirm the molded hole diameter 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 with the mating screw 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, knurl type, chamfer, and surface treatment. Please contact us with your specifications and application details for a quotation.

Details