Description
Product Overview
These threaded inserts are precision-engineered fasteners designed to reinforce and repair internal threads in soft materials such as plastic, copper, and aluminum. Made from durable 302 stainless steel, they offer long-term strength and resistance to corrosion. The self-tapping design allows them to form secure internal threads without requiring pre-drilled holes or additional tools. This set includes 50 inserts ranging from M3 to M16, packaged with a convenient storage box for organized handling. Ideal for both professional workshops and DIY enthusiasts.
Usage
Perfect for repairing damaged threads in household furniture, automotive parts, electronics enclosures, or industrial machinery. Commonly used by mechanics, hobbyists, and engineers who need reliable thread reinforcement without welding or drilling. Suitable for both temporary fixes and permanent installations where vibration resistance is required.

Why Choose Us
The Cunyuer threaded insert set offers superior material quality, precise engineering, and user-friendly design. Each insert is manufactured with a load-distributing structure to prevent loosening under stress or vibration. The storage box ensures organized handling and prevents loss of components during use. Designed for long-term durability and consistent performance in demanding environments.
Key Features
- High-strength 302 stainless steel construction ensures corrosion resistance and long-term durability.
- Self-tapping design allows quick installation without pre-drilling, ideal for repair and assembly tasks.
- Wide size range (M3-M16) provides versatility for various applications including furniture, electronics, and machinery.
- Elastic fit adapts to material expansion and contraction, maintaining tight connections under vibration or stress.
- Included storage box keeps components organized and prevents loss during use or transport.
FAQ
Can these inserts be used in plastic materials?
Yes, they are specifically designed for soft materials like plastic and copper. The self-tapping design forms strong internal threads without damaging the base material.
Do I need to use a specific tool to install them?
A wrench is required for installation (not included). The elastic design ensures secure fit even under vibration or stress, making it suitable for both DIY and professional applications.
What materials are these inserts made of?
They are made from 302 stainless steel, which offers excellent corrosion resistance and long-term durability in various environments.
Are they suitable for heavy-duty industrial use?
Yes, their load-distributing structure ensures stability under stress. They’re ideal for mechanical repairs, furniture assembly, and professional workshops where reliability is critical.
How many sizes are included in this set?
This set includes 50 threaded inserts covering M3 to M16 sizes, making it suitable for a wide range of applications from small electronics to large machinery components.







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