OS4C-120 RC Engine Copper Washers HA194 by Hatroi  [HA194]

Copper crush and spacer washers for OS4C-120

The Hatroi HA194 copper washers are intended as small RC spare parts for the OS4C-120 referenced in the product title. Forged from copper, these washers offer a malleable contact surface that aids sealing and provides precise spacing where metal-to-metal joints benefit from a softer intermediary to maintain contact and reduce loosening from vibration.

They are typically used as crush or spacer washers on threaded fittings and mating surfaces in RC engine assemblies and allied ancillaries. Copper's malleability lets these washers conform under torque to improve sealing while compensating for minor surface irregularities without cracking.

Practical fitment advice: ensure mating faces are free of debris before installation, replace washers that exhibit deformation or work-hardening, and use the correct torque to avoid over-compression. For tuning adjustments, HA194 washers may be employed as thin shims to tweak clearances; make incremental changes and bench-test before operation.