Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 1998392 found under Valve Relay Air Pre by Blue Bird Body Co. The National Stock Number assigned to this part is 2530014933795, and the Federal Supply Class is 2530 Vehicular Brake Steering Axle Wheel And Track Components. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 1998392.