Description
Overview:
The Volkel 4mm Helicoil Thread Insert is a stainless-steel wire insert used to repair stripped threads and to reinforce new threads in softer metals. Sized for M4 threads, it restores a durable internal thread that accepts standard M4 fasteners after installation. The insert's helical coil distributes load over a larger area, improving pull-out resistance and reducing wear in aluminium and other light alloys. Suitable for workshop maintenance, field repairs, and production use, it is commonly applied in housings, covers, and castings on garden machinery, power tools, and construction equipment. With the correct drill, STI tap, and installation tool, the insert fits quickly and accurately, helping you return equipment to service with a strong, reliable thread.
Key Features:
- M4 wire thread insert for restoring damaged internal threads and reinforcing new ones
- Stainless steel construction for strength, corrosion resistance, and long service life
- Improves thread performance in aluminium and other softer metals by spreading load
- Accepts standard M4 screws/bolts once fitted, maintaining original fastener size
- Smooth, free-running profile reduces friction and thread galling during assembly
- Suitable for through and blind holes when installed to the correct depth
- Helps prevent thread wear from repeated assembly and disassembly
- Cost-effective alternative to scrapping or replacing expensive castings or parts
- Quick to fit with the correct STI tap and installation tool, minimising downtime
- Stable under vibration and cyclic loading compared to tapped threads in soft alloys
- Manufactured by Volkel, a trusted specialist in threading solutions
Typical Applications:
Restoring stripped M4 threads in aluminium engine covers, gear housings, pump bodies, electric motor frames, and tool casings. Reinforcing new threads in light alloy castings on lawn and garden machinery, power tools, compressors, generators, and construction equipment. Useful in maintenance, overhaul, and production environments where reliable, repeatable fastening is required.
Also known as:
Wire thread insert, screw thread insert (STI), threaded coil insert, recoil-type insert, spring thread insert, thread repair coil, M4 thread reinforcement insert.
Product Specifications
| L&S Part No. | 902 1511 |
|---|---|
| Manufacturer | Volkel |
| OEM No. | 07307 |
| Unit of Sale | 1 |
| Size | 4mm |
| Key Features | - M4 wire thread insert for repairing and reinforcing threads - Stainless steel for strength and corrosion resistance - Distributes load to improve pull-out resistance - Accepts standard M4 fasteners after installation - Suitable for aluminium and light alloy applications |
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