27170K Fisher Chain Retract Spring M Series MM2

Fisher Spring kit # 27170K.

This is used on the headgear / A-frame for M Series plows using the Minute Mount 2 system. It is included in hardware bag # 26920, but this is for the kit only. The spring is the same for a bunch of Fisher plows.

This looks to be the same spring that comes in kit 27534.

You can find a breakdown of related parts here.