Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number D46-16-03 found under Retainerdiskvalve by Dante Valve Company Inc. The National Stock Number assigned to this part is 4820016967586, 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 D46-16-03.