USA Sealing ZUSA-TF-37FL-74 Tube Cap, 1/4 in Nominal, 37° Flare, 9/16 in Hex, 0.59 in Length, 5000 psi, -325 to 800°F, 316 SS

USA Sealing Tube Cap, Fitting/Connector Type: Cap, 1/4 in Nominal, 37° Flare, 9/16 in Hex, 0.59 in Length, 5000 psi, -325 to 800°F, 316 Stainless Steel, Import.Designed to fit flared metal tubingThey secure with a nut and offer the tightest metal to metal seal of any tube fittings