4x7x1T Flat Washer for RC Helicopters - Hirobo HI2506063  [HI2506063]

Sizing and compatibility guidance

This Hirobo HI2506063 flat washer is an accessory intended for use in helicopter maintenance and assembly tasks. The 4x7x1T marking indicates the washer's nominal inner diameter, outer diameter, and thickness as referenced by the manufacturer and model number.

The washer is suitable as a thin spacer or load-distributing element in rotor linkages, frame joints, and other fastener locations where accurate spacing helps preserve alignment. Its use in setup adjustments is to control play and guarantee consistent contact between mating parts without changing component geometry.

Best practice: verify the washer fits the target bolt or shaft and confirm clearance within adjacent hardware prior to final assembly. Ensure the washer sits flat and does not bend the fastener. Replace any washer that is bent, worn, or otherwise compromised to maintain dependable fastening performance.