Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number D10004-42 found under Valve Rotary Selector by Designed Metal Connections Inc. The National Stock Number assigned to this part is 4820000010010, 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 D10004-42.