Knurled Pins

Knurled pins Product Overview

Knurled pins are fasteners with a precision-knurled surface pattern, designed to prevent loosening, resist slipping, and enhance grip and positioning. Compared to smooth pins, their unique design offers superior performance in high-vibration and high-torque applications. Widely used in power tools, door locks, windows, electric vehicles, construction machinery, and home appliances.

Knurled pins Key Advantages

1. Superior Anti-Loosening & Anti-Slip Performance
Enhanced Friction: Knurled patterns (straight, diamond, or crosshatch) significantly increase surface friction, preventing axial or radial movement.

Self-Locking Design: No additional nuts or adhesives needed — ideal for high-vibration environments (e.g., automotive systems, robotics).

2. High Torque Resistance & Precision Positioning
Rotation Prevention: Knurled teeth bite into mating parts (e.g., plastic, metal holes), eliminating relative rotation and improving transmission stability.

Accurate Alignment: Ensures precise component positioning (e.g., gear and coupling alignment), reducing assembly drift.

3. Versatile Installation Options
Press-Fit Design: Knurled teeth create an interference fit for direct press-in installation, eliminating the need for keyway machining.

Threaded Options: Some knurled pins feature threaded ends (e.g., threaded knurled pins) for easy disassembly and maintenance.

4. Material & Surface Treatment Flexibility
Materials: Carbon steel (45#), stainless steel (304/316), copper, aluminum, and more.

Surface Treatments: Zinc plating, black oxide, nickel plating, Dacromet (corrosion resistance), hard anodizing (wear resistance).

5. Cost Reduction & Process Simplification
Replaces Keyways/Splines: Reduces machining steps and lowers production costs.

Eliminates Additional Fasteners: No need for washers, circlips, or other secondary components.

Knurled Pins Technical Specifications