Double-Step Non-Standard Diamond-Knurled Embedded Nut

Product Specifications

Material	Iron
Surface Treatment	None
Outer Diameter	13.5 mm
Total Length	11 mm
Thread	M8
Process	Machining
Knurl Type	Diamond knurling on the body, with a double-step profile
Price	Please contact us for current pricing.
Customization	Non-standard outer diameter, length, thread size, step dimensions, and knurl pattern are available upon request.

Core Advantages

• Diamond knurling: The cross-hatch knurl pattern engages the plastic in multiple directions and supports resistance to rotational and axial movement.
• Double-step profile: The two-step geometry allows the insert to seat against a matching stepped molded hole and supports axial positioning during installation.
• Anti-pull-out geometry: The knurled body creates mechanical interlock with the plastic after molding, heat staking, or press-fit.
• Iron construction: Iron provides mechanical strength for applications subject to higher tightening torque and load.
• No surface treatment: The untreated surface is suitable for applications where a subsequent coating or plating step is applied by the customer.
• M8 internal thread: Suits fasteners used in larger housings and structural plastic parts.
• Extended body: The 13.5 mm outer diameter and 11 mm total length suit deeper bosses and higher load requirements.

Product Features

• Diamond knurling along the body, with a double-step profile.
• Two-step geometry for seating in molded holes with a matching step.
• Machined iron body with consistent dimensional tolerance.
• Internal M8 metric thread produced to standard pitch.
• Outer diameter of 13.5 mm and total length of 11 mm.
• Supplied without surface treatment.
• Suitable for insert molding, heat staking, press-fit, and ultrasonic insertion.
• Can be produced to customer drawings for non-standard dimensions and step geometry.

Applications

• Home appliance plastic components
• Automotive interior and structural plastic components
• Industrial control panels and instrument casings
• Power tool and equipment housings
• Telecommunications equipment
• Furniture and hardware plastic assemblies
• Prototype and low-volume molded assemblies
• Thermoplastic parts requiring repeated fastening and disassembly

FAQ and Solutions

Q1: What is the function of the double-step profile?
A: The two-step geometry allows the insert to seat against a matching stepped molded hole. This supports axial positioning during installation and provides a defined contact face within the boss.

Q2: How is this insert installed?
A: It can be installed by insert molding, heat staking, press-fit, or ultrasonic insertion, depending on the plastic type and wall thickness. The diamond knurl engages the plastic after the material flows or resets around the body.

Q3: Why is the insert supplied without surface treatment?
A: The untreated surface suits applications where the customer applies a subsequent coating or plating step. It also applies to assemblies where no additional surface protection is required by the operating environment.

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

Precautions

• Confirm the molded hole diameter, step dimensions, and boss wall thickness before installation.
• Use installation parameters recommended for the specific plastic material.
• Iron without surface treatment is subject to oxidation; store in a dry environment and apply surface protection where required.
• Avoid excessive heat during heat staking, which can deform the surrounding plastic.
• 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 embedded nuts can be produced according to customer drawings or samples. Customization options include outer diameter, length, thread size, step dimensions, knurl type, material, surface treatment, and chamfer. Please contact us with your specifications and application details for a quotation.

Details