Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number BOF22389 found under Disk Valve by Marshall Land Systems Limited. The National Stock Number assigned to this part is 4820014346291, 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 BOF22389.