Threaded Insert Nut with Knurling on Both Ends, Injection-Molded

Product Specifications

Part Number	YY00043
Material	303 Stainless Steel
Surface Treatment	Natural finish
Outer Diameter	6.35 mm
Total Length	8.8 mm
Thread	M4
Process	Precision machining
Knurl Type	Diagonal diamond knurling on both ends
Price	Please contact us for current pricing.
Customization	Non-standard outer diameter, length, thread size, and knurl pattern are available upon request.

Core Advantages

• Double-end diamond knurling: Two cross-hatch knurled bands engage the plastic in multiple directions and provide two separate contact zones within the thermoplastic.
• Anti-pull-out geometry: The knurled sections create mechanical interlock with the plastic after molding or heat staking.
• 303 stainless steel construction: 303 stainless steel offers corrosion resistance and machinability, which suits precision turned parts with consistent dimensional tolerance.
• Natural finish: The untreated surface is suitable for applications where no additional coating is required, and for assemblies where the base material properties are used directly.
• M4 internal thread: Suits fasteners used in medium-size housings and precision plastic parts.
• Machined body: The machining process holds consistent tolerance on outer diameter, length, and thread.
• Inch-based outer diameter: The 6.35 mm outer diameter corresponds to 1/4 inch, which suits housings designed to inch dimensions.

Product Features

• Diagonal diamond knurling on both ends.
• Two knurled bands for engagement within the plastic.
• Machined 303 stainless steel body with consistent dimensional tolerance.
• Internal M4 metric thread produced to standard pitch.
• Outer diameter of 6.35 mm and total length of 8.8 mm.
• Natural finish without additional surface treatment.
• Suitable for insert molding, heat staking, ultrasonic insertion, and press-fit.
• Can be produced to customer drawings for non-standard dimensions and knurl patterns.

Applications

• Consumer electronics housings and enclosures
• Automotive interior plastic components
• Industrial control panels and instrument casings
• Medical device plastic housings
• Telecommunications equipment
• Food and beverage equipment housings
• Prototype and low-volume molded assemblies
• Thermoplastic parts requiring corrosion resistance

FAQ and Solutions

Q1: What is the purpose of the double-end diamond knurling?
A: Two cross-hatch knurled bands provide separate engagement zones within the plastic. The diamond pattern engages the material in multiple directions and supports resistance to rotational and axial movement.

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: Why is 303 stainless steel used for this insert?
A: 303 stainless steel offers corrosion resistance and good machinability. It suits precision turned parts where dimensional consistency and resistance to rust are required in the operating environment.

Q4: What information is needed for a custom quote?
A: Please provide outer diameter, total length, thread size, knurl type, material grade, 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.
• Verify thread compatibility with the mating screw before assembly.
• For high-torque applications, test the insert in the actual plastic to confirm performance.
• For applications with specific corrosion requirements, confirm the material grade and operating conditions with us.

Customization and Ordering

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

Details