Threaded Insert – 16903 Series (DIN Standard)
The Threaded Insert 16903 Series, manufactured as per DIN 16903, is designed to provide durable, reusable internal threads in plastic and other soft materials. These inserts are widely used across industries where strong fastening and repeated assembly are required.
Threaded inserts of the 16903 series are precision-engineered components, typically made from high-quality brass, ensuring excellent corrosion resistance, thermal conductivity, and long service life. The inserts feature internal metric threads and external knurling patterns that enhance grip and prevent rotation or pull-out after installation.
Why Choose 16903 Series?
The DIN 16903 threaded inserts are trusted for their precision, strength, and versatility. Whether for high-volume manufacturing or specialized engineering applications, they provide a reliable fastening solution that enhances the structural integrity of plastic assemblies.
Types of Inserts
- Heat Set Inserts: Installed using heat for thermoplastic applications
- Ultrasonic Inserts: Installed using ultrasonic vibration for precision and high strength
- Press-Fit Inserts: Mechanically pressed into pre-drilled holes
- Molded-In Inserts: Embedded during the molding process for maximum retention
Advantages
- Ensures strong and reliable fastening in soft materials
- Prevents thread damage and stripping
- Allows repeated assembly and disassembly
- Enhances product durability and performance
- Cost-effective solution for threaded fastening in plastics
Key Features
- Manufactured as per DIN 16903 standard
- High-strength internal threads for repeated use
- Superior holding power due to optimized knurl design
- Excellent resistance to wear, corrosion, and vibration
- Available in multiple sizes (M2 to M12 or custom)
- Suitable for both blind and through-hole applications
Material & Finish
- Material Options:
- Free Cutting Brass (IS 319 / CZ121)
- Stainless Steel (optional)
- Mild Steel (zinc plated)
- Finishes Available:
- Natural Brass
- Nickel Plated
- Tin Plated (on request)
SERIES 16903 – TYPE A
Thread | S | d3 | L1 |
M3 | 5 | 3,8 | 3 |
M4 | 6 | 5 | 4 |
M5 | 7 | 6.4 | 5 |
M6 | 9 | 7.4 | 6 |
M8 | 11 | 10.4 | 8 |
SERIES 16903 – TYPE B**
Thread | d5 | d3 | L1 |
M2,5 | 3.8 | 3.4 | 2.6 |
M3 | 4.2 | 3.8 | 3 |
M4 | 5.5 | 5 | 4 |
M5 | 7 | 6.4 | 5 |
M6 | 8 | 7.4 | 6 |
SERIES 16903 – TYPE C
Thread | S | d3 | b2 | L2 | d6 |
M3 | 5 | 3.8 | 1 | 4.5 | 4.2 |
M4 | 6 | 5 | 1 | 6 | 5.5 |
M5 | 7 | 6.4 | 1 | 7.5 | 7 |
M6 | 9 | 7.4 | 1 | 9 | 8 |
M8 | 11 | 10.4 | 1 | 12 | 10 |
SERIES 16903 – TYPE D**
Thread | d5 | d3 | b2 | L2 | d6 |
M2,5 | 3,8 | 3.4 | 0.8 | 4 | 3.8 |
M3 | 4.2 | 3.8 | 1 | 4.5 | 4.2 |
M4 | 5.5 | 5 | 1 | 6 | 5.5 |
M5 | 7 | 6.4 | 1 | 7.5 | 7 |
M6 | 8 | 7.4 | 1 | 9 | 8 |
SERIES 16903 – TYPE P
Thread | S | d3 | L1 | L3 |
M3 | 5 | 3.8 | 3 | 5.5 |
M4 | 6 | 5 | 4 | 7 |
M5 | 7 | 6.4 | 5 | 8.3 |
M6 | 9 | 7.4 | 6 | 9.8 |
M8 | 11 | 10,4 | 8 | 12.6 |
SERIES 16903 – TYPE Q**
Thread | d5 | d3 | L1 | L3 |
M2,5 | 3.8 | 3.4 | 2.6 | 4.6 |
M3 | 4.2 | 3.8 | 3 | 5.5 |
M4 | 5.5 | 5 | 4 | 7 |
M5 | 7 | 6.4 | 5 | 8.3 |
M6 | 8 | 7.4 | 6 | 9.8 |
SERIES 16903 – TYPE R
Thread | S | d6 | b2 | L2 | L4 |
M3 | 5 | 4.2 | 1 | 4.5 | 7 |
M4 | 6 | 5.5 | 1 | 6 | 9 |
M5 | 7 | 7 | 1 | 7.5 | 10.8 |
M6 | 9 | 8 | 1 | 9 | 12.8 |
M8 | 11 | 10 | 1 | 12 | 16.6 |
SERIES 16903 – TYPE S**
Thread | d5 | d6 | b2 | L2 | L4 |
M2,5 | 3.8 | 3.8 | 0.8 | 4 | 6 |
M3 | 4.2 | 4.2 | 1 | 4.5 | 7 |
M4 | 5.5 | 5.5 | 1 | 6 | 9 |
M5 | 7 | 7 | 1 | 7.5 | 10.8 |
M6 | 8 | 8 | 1 | 9 | 12.8 |
Installation Methods
| Method | Description |
|---|---|
| Heat Installation | Insert is heated and pressed into plastic |
| Ultrasonic Installation | High-frequency vibration melts plastic locally |
| Press Fit | Insert is mechanically pressed into hole |
| Molded-In | Insert placed during molding process |
Applications
- Plastic injection molded components
- Electrical and electronic housings
- Automotive parts
- Consumer appliances
- Furniture and hardware fittings
Sample Time: Available in 5-10 days for different items.
Drawing Format: CAD / PDF / DWG / IGS / STEP.
Packaging: Standard package, Carton box or Pallet, As per customized specifications
Shipping: DHL, FEDEX, UPS and By Sea or as per client’s requirements.