SWAGELOK SS-QC4-D-400K4
SWAGELOK Quick Connect Stem with Valve, SS-QC4-D-400K4, Shipsameday#D1A
People often mention that the Oil Equipment Mfg 4171 holds up well even under constant use.
SWAGELOK Quick Connect 1/4", SS-QC4-D-400K4, SHIPSAMEDAY#E22A
I have recommended WILTON to friends because it never disappoints in performance.