Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 282B-98 REF 8 AND 9 found under O Ring by American Machine And Tool Co Inc. The National Stock Number assigned to this part is 5331016174318, 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 282B-98 REF 8 AND 9.