Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number F-6978INC REF 13 found under Manometer Aneroid by Blume Worldwide Services. The National Stock Number assigned to this part is 6685014307109, and the Federal Supply Class is . Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like F-6978INC REF 13.