Hirobo HI2506030 Flat Washer 4 x 22 x 1T KDC-B Plastic  [HI2506030]

Flat spacer for rotor head components

This Hirobo flat washer functions as a compact accessory for helicopter model parts that need a thin, reliable spacer. Constructed from KDC-B plastic, it keeps mass low while providing a uniform contact surface for nuts and screw heads. As a non-structural element, it helps distribute clamp loads and maintain alignment at small assembly joints within the model.

Fitting is simple: position the washer between the fastener head and the mating surface to increase bearing area and limit local deformation. The 1T thickness is particularly useful in rotor head stacks and linkage areas to prevent extra stack height that could impede blade or link movement. After installation confirm correct seating and clearance and swap out any washers that show wear.

Practical note: the washer can be used to tweak spacing during rotor head and control linkage setup without changing screw lengths. Given the plastic construction, avoid excessive torque which may crush or shear the part; inspect regularly as part of setup checks.