Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number PK50A found under Parts Kit Engine Water Pump by Airtex Products. The National Stock Number assigned to this part is 2930007371595, and the Federal Supply Class is 2930 Engine Cooling System Components Nonaircraft. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like PK50A.