Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 14-40724-2 found under Ring Annulus by Duhadaway Tool And Die Shop Inc. The National Stock Number assigned to this part is 1710016005676, 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 14-40724-2.