Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number D92270 ITEM 4 found under Disk Valve by Short Thomas A Co. The National Stock Number assigned to this part is 4820014734744, 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 D92270 ITEM 4.