GlowShifts 5/8-18 UNF Male to 1/8-27 NPT Female Thread Adapter allows you to thread a 1/8-27 NPT sensor into a 5/8-18 UNF thread port. This adapter is ideal for any sensor used for oil pressure, fuel pressure, air pressure or nitrous pressure gauges by converting the 1/8-27 NPT thread to the proper size needed for the application. Manufactured from high quality brass, each adapter is built to be long lasting. At GlowShift Gauges we also back any purchase with unrivaled Customer and Tech Support.