Normal brass g1/4 to 3/8 compression fitting

[Nosparatu]

I don't want some special ten dollar a piece fitting, im looking for the standard nut and stem compression fitting, ill be running copper tubing and i want these for aesthetic. Any direction would be nice because i can't find much of anything smaller than g5/16 or npt. Much thanks

 

[InvalidError]

5/16" copper tubing is the smallest common type for construction, smaller than that falls in the specialty category, which is why fitting selection is far more sparse in typical hardware stores.