Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 2635-088-20 ITEM 1-4 found under Electronic Module Standardized by Electric Boat Corporation. The National Stock Number assigned to this part is 5963013079908, and the Federal Supply Class is 5963 Electronic Modules. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 2635-088-20 ITEM 1-4.