Thread : 1/8 BSPT Male Thread to 3/8 BSPT Female Thread. Male Thread : 1/8 BSPT. Female Thread : 3/8 BSPT. BRASS SUMP PLUG OIL TEMPRATURE SENSOR GAUGE ADAPTER x 1 piece. Thread : M14x1.5 Male Thread to 1/8"x28 BSP Female Thread.
eBay