Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 501990-001 found under Computer Subassembly by Ast Research Inc. The National Stock Number assigned to this part is 7050014418377, and the Federal Supply Class is 7050 Adp Components. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 501990-001.