Hirobo HI2506028 Flat Washer 3.9 x 5.8 x 0.1 mm, washer for helicopter general parts  [HI2506028]

Flat washer for RC helicopters

This Hirobo flat washer is an RC-scale accessory intended for general helicopter parts where thin spacing and secure seating are required. The item matches the dimensions listed in the part name, 3.9 x 5.8 x 0.1 mm, and is used as a thin spacer or seating surface between fasteners and linkage components on model helicopters.

In use, a flat washer of this size helps distribute load across small screw heads and reduces wear on soft or plated surfaces around control link connections and bearing housings. It is commonly fitted under screw heads or nuts that clamp control links, rotor assemblies, or bearing retainers, providing consistent spacing and helping to limit lateral play at pivot points.

Installation is straightforward: place the washer between the fastener head and the mating surface or between the nut and the part, ensuring the hole alignment matches the fastener diameter. Because this is a thin 0.1 mm washer, it is primarily for fine adjustments to stack height and for preserving contact surfaces rather than heavy load bearing.