Premium Anti-Vibration Key Locking Thread Inserts
Main Features
- Permanent mechanical locking structure: Lock pins embedded into base to prevent spin-out under long-term vibrating loads.
- Cost-effective thread restoration: Recover damaged tapped holes without scrapping expensive original parts.
- Multi-base compatibility: Perfect for aluminum, magnesium alloy, cast iron and high-strength engineering plastic.
- Flexible customized service: Custom thread pitch, overall length and pin quantity per customer drawings.
- Excellent fatigue performance: Keep stable fastening after thousands of repeated vibration cycles.
4.2 Product Specifications
|
Item |
Parameter Info |
|
Product Name |
Premium Anti-Vibration Key Locking Thread Inserts |
|
Available Material |
Zinc Plated Carbon Steel, SUS304, SUS316 Stainless Steel |
|
Surface Finish |
Yellow Zinc / Blue Zinc / Color Zinc Plating, Passivation, Stainless Natural Finish |
|
Thread Standard |
Metric M3~M30, Imperial UNC & UNF Inch Thread |
|
Lock Pin Count |
2 pins /3 pins depending on outer dimension |
|
Quality Test |
Dimension check, tensile strength test, 72h salt spray test, cyclic anti-vibration test |
|
Custom Option |
Non-standard length, special high anti-corrosion coating |
Metric Regular Specification Dimension Table
|
Inner Thread |
Outer Dia(mm) |
Pitch |
Standard Length |
Pre-drill Hole Size |
Min Blind Hole Depth |
|
M3 |
4.6 |
0.5 |
6,8 |
4.2~4.3 |
8,10 |
|
M5 |
7.6 |
1.0 |
10,12 |
7.1~7.2 |
13,15 |
|
M6 |
9.1 |
1.5 |
12,15 |
8.6~8.7 |
15,18 |
|
M10 |
14.2 |
1.5 |
18,22 |
13.3~13.5 |
22,26 |
4.3 Installation Guide (With operation pictures)
Installation Procedures
- Drill pilot hole strictly following recommended bore dimension, fully remove burr around hole edge.
- Tap pre-drilled hole with matched exclusive tap, blow out metal scraps with compressed air.
- Fix insert onto dedicated installation tool with lock pin end facing workpiece surface.
- Rotate tool clockwise steadily to screw insert flush with workpiece surface, keep vertical all the time.
- Apply stable torque to squeeze lock pins into substrate until full embedding to finish locking.
Important Installation Tips
- Never reverse wrench after pins start embedding, counter rotation will crack lock pins and waste inserts.
- Slow down installation speed when mounting on soft magnesium/aluminum alloy to avoid base cracking.
- Automatic electric installation machine is recommended for large-batch production to guarantee consistent mounting quality.
4.4 Industry Application (With application scene images)
Premium Anti-Vibration Key Locking Thread Inserts act as reliable thread reinforcement accessories for mass OEM production and field maintenance across diverse industries.
In new energy industry, inserts are widely fitted on new energy vehicle motor housings, battery fixing brackets and wind turbine casing parts to resist high-frequency rotation vibration. For general machinery sector, they reinforce threaded holes of hydraulic pump housings, gearbox casings and automated equipment frames. Besides, they are extensively used in railway transit components, marine hardware and high-precision medical instruments requiring long-term stable fastening.
No matter pre-installation for new products or damaged thread repairing for used equipment, these key locking inserts effectively cut production downtime and spare part costs for global manufacturers.