Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number SK4407 74 found under Tachometer Mechanical Fixed Moun by Avon Inflatables Ltd Part Ofzodiac. The National Stock Number assigned to this part is 6680015606779, 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 SK4407 74.