Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number N9-8-13 3X2 4 found under O Ring by Bofors A B. The National Stock Number assigned to this part is 5331121224261, 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 N9-8-13 3X2 4.