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Key-Locking Insert (Keensert-Style)
-- Steady & Reliable Manufacturer --
Product Overview
This key-locking insert is a solid, thin-wall bushing with external locking keys, rather than a coiled wire, and is intended for holes where a wire thread insert cannot provide enough pull-out or torque-out resistance. After the hole is tapped and a keyway is cut, the insert is driven in and the keys are staked into the keyway slots with a matching installation tool, locking it mechanically against rotation and back-out.
We supply this insert to buyers repairing or reinforcing threads in soft or thin-wall castings, such as aluminum, magnesium and zinc housings, where repeated bolt removal and reinstallation would otherwise wear out the parent thread.
Specifications
| Item | Detail |
|---|---|
| Material | 300 series stainless steel; plated steel on request |
| Design | Solid bushing body with 2 or 4 external locking keys |
| Thread Size Range | Metric M4 – M20; Unified #6-32 – 3/4"-10 |
| Installation Method | Tap hole, cut keyway with matching tool, drive insert, stake keys |
| Surface Finish | Passivated, zinc plate, or phosphate & oil |
| Torque Rating | Rated pull-out and torque-out values by size (data sheet on request) |
| Reusability | Rated for repeated bolt removal/reinstallation without parent-thread wear |
| Packaging | Poly bag → inner box → export carton |
Application Fields
- ✓Aluminum and magnesium engine and gearbox housings
- ✓Thin-wall die-cast components
- ✓Repeated-disassembly maintenance points (access panels, service covers)
- ✓Mold and tooling repair in soft base metals
- ✓Aerospace structural fittings requiring high pull-out strength
- ✓General thread reinforcement in low-strength base materials
Key Advantages
- Mechanical key-locking resists rotation and pull-out better than a coil insert in soft base metals.
- Rated for repeated bolt removal and reinstallation without progressively wearing out the parent thread.
- Solid bushing wall spreads clamp load over a larger bearing area than a wire coil can.
- Suited to structural or safety-critical joints where a coil insert's holding strength would be marginal.
- Compatible with a dedicated installation tool for consistent key-staking depth from unit to unit.
Company Profile
Dongtai Jinzhize Metal Products Co., Ltd.
As Key-Locking Insert (Keensert-Style) Manufacturer and Key-Locking Insert (Keensert-Style) Factory, Dongtai Jinzhize Metal Products Co., Ltd. is a specialized manufacturing facility dedicated to threaded connection products for the automotive and aerospace sectors. We primarily produce Helical Wire Inserts, Self-Tapping Inserts, Key Locking Inserts, Threaded Adapters, Oil Plugs, as well as matching installation taps and tools.
Established in 2015, the company operates from a 10,000-square-meter-owned manufacturing plant equipped with hundreds of machine tools and automated production systems. Through years of development, we have built an experienced team of design, development, and production specialists, complemented by a rigorous quality management system and comprehensive after-sales service mechanism.
Our products are widely utilized in the automotive industry (including engines and transmissions for both passenger and commercial vehicles), the aerospace industry, and rail vehicle manufacturing.
With an annual output value of 153 million RMB in 2024, we possess the capability for a large-scale, stable supply. We are committed to providing customers with highly consistent, traceable products and reliable service support.
