Threaded Inserts 1. Introduction Threaded Inserts are fastening components used to create strong, reusable internal threads in materials that are too soft, thin, or weak to hold threads directly. They are widely used in: •
Automotive industry
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Furniture manufacturing
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Aerospace industry
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Electronics
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Plastic components
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Wood applications
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Metal fabrication
Threaded inserts improve strength and durability of threaded connections.
2. What is a Threaded Insert? A threaded insert is a metal component installed into a material to provide internal threads for bolts or screws. It allows: •
Stronger fastening
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Repeated assembly and disassembly
•
Repair of damaged threads
Threaded inserts are commonly used in materials such as plastic, wood, aluminum, and soft metals.
3. Types of Threaded Inserts 1. Press-Fit Inserts Installed by pressing into a hole. 2. Self-Tapping Inserts Cut their own threads during installation.
3. Heat-Set Inserts Installed into plastic using heat. 4. Key-Locking Inserts Used to repair damaged threads in metal. 5. Helical Inserts (Wire Inserts) Coil-shaped inserts used for thread repair. 6. Expansion Inserts Expand inside the material for secure grip.
4. Materials Used Threaded inserts are manufactured in: Brass •
Corrosion resistant
•
Common for plastic applications
Stainless Steel •
High strength
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Corrosion resistant
Carbon Steel •
Economical
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Strong
Aluminum •
Lightweight
Material selection depends on application and environment.
5. Common Standards Threaded inserts are manufactured according to standards such as: •
ISO
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DIN
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ASTM International
Thread standards may include: •
Metric Threads (ISO)
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UNC / UNF Threads
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BSW Threads
6. Sizes and Dimensions Threaded inserts are available in: •
Finish selection depends on corrosion requirements.
9. Applications Threaded inserts are widely used in: •
Plastic parts
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Wooden furniture
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Aluminum castings
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Automotive parts
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Electronic housings
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Machinery repair
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Molded components
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Aerospace assemblies
They are especially useful for repeated fastening and disassembly.
10. Advantages of Threaded Inserts •
Strong internal threads
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Prevent thread stripping
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Suitable for soft materials
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Allow repeated use
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Repair damaged threads
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Improve product life
11. Installation Methods Installation depends on insert type: Press-Fit Inserted using press machine. Heat-Set Heated tool melts plastic and insert is pressed in. Self-Tapping Screwed directly into drilled hole. Key-Locking Installed into threaded hole and locked with keys. Proper installation ensures maximum strength.
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Threaded Inserts
Threaded Inserts 1. Introduction Threaded Inserts are fastening components used to create strong, reusable internal threads in materials that are too ...
