Plug - Delrin, 1/4-28 Flat-Bottom Back Catalog number: P-309 Availability: In the manufacturer's stock Price on request - + Recommended S-104-1 Swagelok Back Ferrule SS, 1/16" Price on request F707-08 Couplings, PTFE, UNF ¼” 28G for tubing (1/16" x 1/8")-1,6 x 3,2mm Price on request JR-ZF1S6-5 Ferrule, SS, 1/16"; Valco type, 5/pkg Price on request