Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number AV174-360-11 ITEM 15 found under O Ring by Automatic Switch Company. The National Stock Number assigned to this part is 5331014608932, 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 AV174-360-11 ITEM 15.