Swagelok SS-4-WVCR-6-DF
SWAGELOK SS-4-WVCR-6-DF UNION, FEMALE, ROTATING, SS, 1/4", WVCR
A nice touch with this red color is how it hides minor scuffs.
VCR Face seal fitting, Swagelok SS-4-WVCR-6-DF, Rotating female union connector
You will see that Thermal Transfer Products LTD tests their gear for extreme conditions.