This Aeroquip by Danfoss / Eaton spare part is a size 12 ORB lock nut, also known as a jam nut. The DANFOSS / EATON ORB LOCK NUT SIZE 12 is constructed of durable steel for reliable performance.
This lock nut is compatible with a variety of fluids. It is part of the Aeroquip sub-brand within the Danfoss Power Solutions line.