P312R as described in National Airparts Inc., Manual No. ALT4COV1.SAM Alternator for Piper

Description
Alternator

Compatibility

American Champion (7ECA),Cessna (177RG, C177, 172RG),Mooney Aircraft (M20C, M20E, M20F, M20G, M20J),Piper (PA-28-140, -150, -160, -180, PA-28R-180, -200, PA-28-235, PA-32-260, -300, PA-34-200, PA-38-112, PA-44-180),Tiger Aircraft (AA-1, -1A, -1B, -1C, AA-5)
OEM part number Prestolite ALE6406, ALE8406, ALT8421, ALU8421, ALX8403, ALY6420, ALY6421, ALY6422, ALY8503, ALY8420M, ALY8420, ALZ8401