Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number DP50550NPC89 found under Diaphragm Cupped by Westinghouse Air Brake Technologies. The National Stock Number assigned to this part is 2030002169422, and the Federal Supply Class is 2030 Deck Machine. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like DP50550NPC89.