Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 1-01-451 found under Manometer Inclined Tube by Scandinavian Boiler Serviceinc. The National Stock Number assigned to this part is 6685014333433, 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 1-01-451.