Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number EFR-SF0-1-NO-B found under by Dsme E And R Ltd. The National Stock Number assigned to this part is 5930016449857, and the Federal Supply Class is 5930 Switches. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like EFR-SF0-1-NO-B.