The hexagonal machine thread screw with a step washer and insert is a multifunctional fastener. Below is a guide to its use.
The hexagonal machine thread screw with a step washer and insert (M3-M6) is a multifunctional fastener that integrates several functional elements:
Hexagonal head: Easy to tighten with tools
Washer: Integrated design prevents washer loss
Step design: Provides precise positioning
Machine thread: Suitable for metal-to-metal connections
Anti-slip adhesive: Pre-applied anti-loosening adhesive to the threads
Instructions
1. Preparation
Confirm the materials of the parts being joined (recommended for metal-to-metal connections)
Check that the threaded hole dimensions meet the standard (M3 base hole Φ2.5, M4 base hole Φ3.3, M5 base hole Φ4.2, M6 base hole Φ5.0)
Prepare appropriate tools (open-end wrench or socket)
2. Installation Procedure
Alignment Installation: Insert the screw vertically into the connection hole.
Initial Tightening: Manually tighten 2-3 turns to ensure proper thread engagement.
Final Tightening:
Use a torque wrench to tighten to the recommended value.
Recommended Torque: M3 (1.5-2 N·m), M4 (3-4 N·m), M5 (6-8 N·m), M6 (10-12 N·m).
Check to ensure the gasket is fully seated against the connected surfaces.
3. Special Considerations
Activating Anti-Loosening Adhesive: After tightening, allow 1-2 hours for the anti-loosening adhesive to fully cure.
Reusability: Removal is recommended no more than three times, as the anti-loosening effect will diminish.
Step Application: The step should fully penetrate the hole in the first panel.
Application Scenarios
Precision Instruments: Use the step for precise positioning.
Vibration Environments: Anti-loosening design prevents loosening.
Multi-panel Connections: Integrated gaskets ensure even pressure distribution.
Outdoor Equipment: Anti-loosening properties adapt to temperature fluctuations.
Maintenance and Disassembly
During disassembly, apply a torque 20% greater than that used during installation. If the adhesive layer is severely cured, heat it locally to 80-100°C to soften it. Clean any remaining adhesive from the threaded holes after disassembly.
Common Problem Solutions
Problem: The Screw gets stuck halfway through tightening
Solution: Unscrew and inspect the threads for foreign matter. Do not force the screw in.
Problem: Washer won't rotate
Solution: This is a normal design feature. Ensure the contact surface between the washer and the workpiece remains stationary during tightening.
Problem: Reduced anti-loosening effect
Solution: Thread sealant (such as Loctite 243) can be added.
Proper use of this multifunctional screw significantly improves assembly efficiency and connection reliability. It is particularly suitable for precision mechanical connections requiring anti-loosening, positioning, and pressure distribution.
Through its integrated structure and upgraded anti-loosening technology, this screw solves the loosening problem of traditional screws in vibrating environments, while improving assembly efficiency and reliability. It is an ideal fastening solution for precision industrial applications.
