Threaded Inserts for Strong, Wear-Resistant Plastic Threads
Threaded Inserts for Strong, Wear-Resistant Plastic Threads
High-precision brass threaded inserts with knurled outer grip (diamond/straight) for durable threads in plastic parts—ideal for injection molding, 3D printing, electronics, automotive panels, and household products.
Brass Plastic Molding Inserts (threaded inserts for plastic) are high-precision components used to create strong, durable threads in plastic parts. Manufactured from premium brass, these inserts feature specially designed external knurling (diamond or straight patterns) that provides a firm grip inside plastic materials—helping prevent rotation and pull-out. The internal threading is precisely machined for smooth, secure screw/bolt fitment, making them ideal for repeated assembly and disassembly without wear. Widely used across industrial, automotive, electronics, and engineered plastic assemblies, these inserts provide excellent resistance to wear, corrosion, and typical temperature variations in day-to-day applications. Installation can be done using heat insertion (most popular), mold-in insertion during injection molding (strongest), or ultrasonic insertion depending on the plastic type and production process.
Material
Premium Brass
Where this product is commonly used — from standard assemblies to custom requirements.
Built for accurate fitment, consistent finishing, and reliable performance in real‑world applications.
Benefits
Standard technical information. Custom specs are available on request.
Product Name
Brass Plastic Molding Inserts
Material
Premium Brass
Type
Threaded Insert / Knurled Insert
Design
Knurled outer surface (diamond / straight) for anti-rotation grip
Internal Threading
Precision-cut threads for smooth screw/bolt fitment
Available Thread Sizes ( Metric)
M2 · M2.5 · M3 · M4 · M5 · M6 · M8
Outer Diameter ( O D)
Varies based on application and insert type
Length Options
3 mm to 20 mm (depending on size and requirement)
Common Size Applications
M2/M2.5: 3–5 mm (small electronics/PCBs) · M3: 4–10 mm (laptops/3D prints) · M4/M5: 6–12 mm (switchboards/appliances/toys) · M6/M8: 10–20 mm (automotive/furniture)
Installation Methods
Heat insertion · Mold-in insertion · Ultrasonic insertion (as per requirement)
Application
Strong threads in plastic parts for repeated fastening
Also Known As
Brass Knurled Nuts · Threaded Inserts · Heat-Stake Inserts · Molding Bush · Ultrasonic Inserts
| Product Name | Brass Plastic Molding Inserts |
| Material | Premium Brass |
| Type | Threaded Insert / Knurled Insert |
| Design | Knurled outer surface (diamond / straight) for anti-rotation grip |
| Internal Threading | Precision-cut threads for smooth screw/bolt fitment |
| Available Thread Sizes ( Metric) | M2 · M2.5 · M3 · M4 · M5 · M6 · M8 |
| Outer Diameter ( O D) | Varies based on application and insert type |
| Length Options | 3 mm to 20 mm (depending on size and requirement) |
| Common Size Applications | M2/M2.5: 3–5 mm (small electronics/PCBs) · M3: 4–10 mm (laptops/3D prints) · M4/M5: 6–12 mm (switchboards/appliances/toys) · M6/M8: 10–20 mm (automotive/furniture) |
| Installation Methods | Heat insertion · Mold-in insertion · Ultrasonic insertion (as per requirement) |
| Application | Strong threads in plastic parts for repeated fastening |
| Also Known As | Brass Knurled Nuts · Threaded Inserts · Heat-Stake Inserts · Molding Bush · Ultrasonic Inserts |
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