Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number A20-1-63 found under Body Fire Extinguisher Nozzle Va by Stop Fire Inc. The National Stock Number assigned to this part is 4210003303622, and the Federal Supply Class is 4210 Firefighting Equipment. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like A20-1-63.