Part number 417-5260 is no longer manufactured. A possible replacement is 417-5060, however, it does require a ribbed gasket (711-4030) or an o-ring (805-0229) Notice the groove on the face of buttress side. The older obsolete version was smooth for a flat gasket.
417-5060 is a 2″ SPG and will not work as a 1.5″ slip. If you need this fitting for a 1.5″ slip use part number 417-2090. All the fittings mentioned are the same on the buttress thread side.
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