Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number P49838-3 found under Parts Kit Seal Replacement Mecha by Westinghouse Air Brake Technologies. The National Stock Number assigned to this part is 2520000207721, 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 P49838-3.