USA Sealing ZUSA-TF-37FL-75 Tube Cap, 3/8 in Nominal, 37° Flare, 11/16 in Hex, 0.63 in Length, 5000 psi, -325 to 800°F, 316 SS

USA Sealing Tube Cap, Fitting/Connector Type: Cap, 3/8 in Nominal, 37° Flare, 11/16 in Hex, 0.63 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