Stack Mount Adapters M4 to M3 (pack of 20)

Stack Mount Adapters to convert a 4mm hole to M3 mounting. Using these adapters, you can hard mount an ESC which has 4mm size mounting holes on a stack which uses M3 bolts.

Some larger 4 in one ESCs for use with 30 x 30 mounting patterns have 4mm mount holes. These are intended to be mounted with soft dampeners which fit into the 4mm holes and allow the ESC to be mounted on a stack which uses M3 Bolts. However, soft mounting an ESC is not necessary, and you may prefer to hard mount it instead. That’s where these adapters come in handy.  Hard mounting the ESC instead takes up less room in tight stacks.