60pcs M4 Counterbore Washers, 10mm/0.39inch Anodized Aluminum Alloy, Head Gaskets for Screw RC, Navy Blue

What is this?
M4 finishing countersunk washers anodized are decor for Screw RC/FPV/PC/Drone/Mechanical Accessories Model Parts, etc.

Are there any advantages of the product?
The aluminum washers are made of aluminum alloy, lightweight, wear-resistant, and hard. The M4 washer is anodized to prevent rust. The surface is smooth and bright without burrs, the pattern is evenly distributed, and the process is beautiful, uniform force, anti-slip and anti-loose.

How to use it?
Insert the screws or bolts through the part to be installed and place aluminum alloy countersunk head washers on them. Use a wrench or torque wrench to moderately tighten the screw or bolt to the desired tightness.

What should I notice?
Manual measurement, please allow some errors. Please select the correct size and specification of the gasket. Be sure not to over-tighten to avoid damaging the gaskets or connections.