Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number A03-028 found under Plunger And Spring by Parker Hannifin Ltd. The National Stock Number assigned to this part is 2520009986002, and the Federal Supply Class is 2520 Vehicular Power Transmission Components. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like A03-028.