What is this?M4 finishing countersunk washers anodized are decor for Screw RC/FPV/PC/Drone/Mechanical Accessories Model Parts, etc.What will I get?Outer diameter: 10mm/0.39inch; Hole diameter: 4.1mm/0.16inch; Thickness: 2.5mm/0.1inch; Color: Black; Material: Aluminum Alloy; In the package of: 10pcsx M4 Countersunk WashersAre 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.
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