Hirobo HI2506020 Thin Flat Washer 5 x 10 x 1T for Helicopter Use  [HI2506020]

Flat shim washer for small helicopter builds

This flat washer appears in the Hirobo general helicopter parts list under model HI2506020, with the size given as 5 x 10 x 1T in the product title. It provides a thin, stable spacer between mating parts and fasteners in model assemblies.

Practical uses include trimming axial clearance, preventing direct metal contact, and maintaining proper preload on miniature shafts and bearings. Because it is thin, the washer doubles as a shim for slight dimensional corrections during build or repair.

Assembly advice: ensure surfaces are clean, check the washer slides freely over the shaft or bolt, then fit components so the washer is flat and not bent. For tuning adjustments, change the stack height by single washers and test linkages and bearings for smooth operation after each modification.