This is a first for me. I never seen one of these before, much less used for gas.
Anyone else seen this before?
Are you sure it is not brass?
BTW-Whitey is now Swagelok
double checked it with my screwdriver and fingernail.
Who ever installed it did not understand the concept of the square body for a wrench and used a channel-locks or pliers in stead.
That’s where Peter “checked” it :p:twisted::D:D
Touche