Binary Pressure Switch - 7/16" x 20 Female Flare Thread EARLY serial numberOEM part numbers 76034859, 5192342 Item Information Normally Open 7 16 20 Female Flare Thread Additional Information Serial Number 1230930 and Below, Reference Number C4721 Specifications LOW PRESSURE CLOSES 28 PSI Rising Pressure LOW PRESSURE OPENS 28 PSI Falling Pressure HIGH PRESSURE OPENS 380 PSI Rising Pressure HIGH PRESSURE CLOSES 230 PSI Falling Pressure SWITCH TYPE Normally Open Compatible With New Holland TractorTN90F