Sierra International OP22900 6 PSI Trip Marine Oil Pressure Switch Sierra OP22900 6 psi trip, marine oil pressure switch with npt thread Size 46395; terminal type: 10-32 stud Before ordering, please verify this is the correct part for your application. For assistance, please call sierra's Tech support at 1-877-663-8396 All sierra Parts qualify for and are covered under sierra's industry leading customer satisfaction warranty