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

Micro flat washer for helicopter linkages

The Hirobo HI2506028 is a micro flat washer designed for fine adjustment tasks on model helicopters. With dimensions of 3.9 x 5.8 x 0.1 mm, it functions as a precise shim or seating washer to set stack height and improve control linkage alignment.

Used in tuning, this thin washer helps reduce play at pivots and spreads the clamping load from small screw heads to protect adjacent finishes. It is typically placed under screws or nuts that secure control links, rotor components, or bearing retainers to dial in clearance and reduce unwanted lateral movement.

Installation is straightforward: align the washer hole with the fastener shaft and place it between the head and mating surface or beneath the nut as required. Given its 0.1 mm thickness, it is best applied for incremental adjustments and surface preservation rather than heavy duty spacing.