Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 09-4880 found under Valve Vacuum Breaki by Market Forge Industries Inc. The National Stock Number assigned to this part is 4820012627529, and the Federal Supply Class is 4820 Valves Nonpowered. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 09-4880.