Hirobo HI2506030 4 x 22 x 1T KDC-B Flat Washer for Helicopter Linkages  [HI2506030]

Washer designed for model helicopter joints

This Hirobo flat washer is built as a small accessory for helicopter parts where a slim spacer is needed to control stack height. The KDC-B plastic composition reduces weight yet delivers a consistent bearing surface beneath screw heads and nuts. Being non-structural, the washer's main function is to distribute clamp forces and assist alignment at joint interfaces on the model.

Fitting is simple: place the washer under the fastener head or nut to increase bearing area and lower the chance of local deformation. The thin 1T profile is useful around rotor heads and linkages to prevent interference with moving parts. After fitting, check seating and clearance and replace any washers that show wear.

Maintenance advice: use this washer when adjusting rotor head geometry or linkages to get precise spacing without altering fastener length. As a plastic component, it should not be over-torqued; include it in routine inspections to ensure continued serviceability.