Key Ring, 1 In, Pk25/ THREAD DIRECTION: RIGHT-HAND END ITEM IDENTIFICATION: 2HP CENTRIFUGAL PUMP 4XZ16 NSN 4320-01-506-2047 THREAD QUANTITY PER INCH: 20 NOMINAL THREAD SIZE: 0.438 INCHES PART NAME ASSIGNED BY CONTROLLING AGENCY: STAINLESS STEEL ACORN NUT 7/16-20 FOR CENTRIFUGAL PUMP SPECIAL FEATURES: REPAIR PART FOR CENTRIFUGAL PUMP 4XZ16 NSN 4320-01-506-2047; STAINLESS STEEL; 7/16-20; ALSO CALLED ACORN NUT MATERIAL: STEEL CORROSION RESISTING OVERALL