Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number DE7-28 found under Circuit Card Assemb by Insinger Machine Company The. The National Stock Number assigned to this part is 5998013536109, 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 DE7-28.