Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number D4400 ITEM 12 found under Valve Ball by Dante Valve Company Inc. The National Stock Number assigned to this part is 4820015907166, 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 D4400 ITEM 12.