45 Degree Half Union 2 Inch SPG 2 Inch FBT 0604-20

Magic Plastics PVC 45 Degree half-union complete with o-ring.

This union has 2 inch SPG connection on one end and 2 inch FBT threaded connection on the other (female buttress threads).

Part 0604-20 comes with oring.

This part also used by Nordic Hot Tubs as part of a retrofit spa pack kit.

This 0604-20 may be referred to as a 2 inch half-union, but the 2 inches refer to inside diameter of the pipe/hose being connected, not any measurement on the actual part.  45 degree union for 2 inch plumbing.

Union nut measurement.

This 0604-20 pump union used in Nordic and other brand hot tubs.