Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 15-0500-03225 ITEM 281 found under O Ring by Cincinnati Gear Co The. The National Stock Number assigned to this part is 5331013444230, 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 15-0500-03225 ITEM 281.