Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 281250-0008 ITEM 63 found under O Ring by Marotta Controls Inc. The National Stock Number assigned to this part is 5331001668403, 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 281250-0008 ITEM 63.