Adapter Nut (10050069): 3/8 A Bulb A20DP Differential Pressure Swichgages If the clean oil supply

If the clean oil supply is depleted and oil level continues to fall

Applications forA25 Series temperature Swichgage instruments include: engines and equipment in the oil field

The 20P-75 Pressure Swichgage was specifically designed to protect engines and equipment in oil field

The 20T-250-8-1/2 is a 2" Temperature Swichgage

Adapter Nut (10050069): 3/8 A Bulb A20DP Differential Pressure Swichgages If the clean oil supplyThe standard threading size at the end of a temperature gauge capillary tube is 5 8 18 UNF (Union Nut). The inner threads of this 3 8 A Bulb Adapter Nut measure 5 8 18 UNF, to make the correct connection to the stationary end of the temperature gauge capillary tube. The outer threads measure 3 8 18 NPT allowing you to make a non standard connection to match your application, which is generally a connection to the coolant bath of your engine block.