Hirobo HI2506028 Flat Washer 3.9 x 5.8 x 0.1 mm for Helicopter Linkages  [HI2506028]

Precision flat washer for model helicopters

This Hirobo HI2506028 flat washer is a slim RC accessory intended where low-profile spacing and reliable seating are required in helicopter assemblies. The part matches the dimensions in the product name, 3.9 x 5.8 x 0.1 mm, and serves as a thin spacer or bearing seating surface between fasteners and linkage components.

When fitted, the washer spreads clamping force from small screw heads and helps limit wear on soft or plated surfaces near control link pivots and bearing housings. It is typically placed beneath screw heads or nuts that secure control links, rotor fixtures, or bearing retainers to maintain consistent spacing and reduce lateral play.

Fitting is simple: position the washer between the fastener head and mating surface or between the nut and part, ensuring the hole aligns with the fastener diameter. At just 0.1 mm thick, it is best used for micro-adjustments to stack height and surface protection rather than primary load transfer.