Double-Flanged Brass Embedded Nut with Diagonal Knurling, Blind-Hole Type

Product Specifications

Material	Brass
Surface Treatment	Natural finish, cleaning
Outer Diameter	7 mm
Total Length	17.5 mm
Thread	M4
Process	CNC turning
Head Type	Double flange, with diagonal knurling on the body
Thread Type	Blind hole, internal thread
Price	Please contact us for current pricing.
Customization	Non-standard outer diameter, length, thread size, flange dimensions, and knurl pattern are available upon request.

Core Advantages

• Double flange: Two flanges provide bearing surfaces at separate positions along the body and can seat against matching features in a molded boss or panel.
• Diagonal knurling: The angled knurl pattern engages the plastic in both rotational and axial directions, supporting torque and pull-out resistance.
• Blind-hole thread: The closed internal thread limits screw depth and prevents pass-through, which suits spacing and support functions.
• Anti-pull-out geometry: The knurled body creates mechanical interlock with the plastic after molding or heat staking.
• Brass construction: Brass offers thermal conductivity and corrosion resistance in typical indoor environments, and is compatible with common molding and heat-staking processes.
• Natural finish with cleaning: The cleaning treatment removes machining residue, and the natural finish suits applications where no additional coating is required.
• Extended length: The 17.5 mm total length suits deeper bosses and provides a longer thread engagement depth.
• M4 internal thread: Suits fasteners used in medium-size housings and precision plastic parts.

Product Features

• Double flange with diagonal knurling along the body.
• Blind-hole internal thread with a closed end.
• Machined brass body with consistent dimensional tolerance.
• Internal M4 metric thread produced to standard pitch.
• Outer diameter of 7 mm and total length of 17.5 mm.
• Natural finish with cleaning treatment.
• Suitable for insert molding, heat staking, ultrasonic insertion, and press-fit.
• Can be produced to customer drawings for non-standard dimensions and flange geometry.

Applications

• Consumer electronics housings and enclosures
• Home appliance plastic components
• 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 spacing and a defined thread depth

FAQ and Solutions

Q1: What is the function of the double flange?
A: Two flanges provide bearing surfaces at separate positions along the body. They can seat against matching features in a molded boss and support positioning and load distribution during installation and tightening.

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 function of the blind-hole thread?
A: The closed internal thread limits screw depth and prevents the screw from passing through the insert. This suits spacing and support functions where a defined thread depth is required.

Q4: What information is needed for a custom quote?
A: Please provide outer diameter, total length, thread size, flange diameter and thickness, knurl type, blind-hole depth, material, surface treatment, quantity, and any drawing or tolerance requirements.

Precautions

• Confirm the molded hole diameter, flange 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 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, flange dimensions, knurl type, blind-hole depth, material, surface treatment, and chamfer. Please contact us with your specifications and application details for a quotation.

Details