Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 501-2959 found under Circuit Card Assemb by Sun Microsystems Inc. The National Stock Number assigned to this part is 5998014743706, and the Federal Supply Class is 5998 Electrical And Electronic Assemblies Boards Cards And Associated Hardware. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 501-2959.