Male Nut, flangeless, PP, 1/4-28, for 1/16'' OD

SS Tube Fitting, Male Connector, 1/8 in. tube OD x 3/8 in. male

UNIQUAL CONNECTORS PP, 4-6-8/10-12mm (Nominal)

SS Male Connector 1/4" Tube x 1/4" PF