Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number BUNA-N 0.284X0.028 70 BN found under O Ring by Apple Rubber Products Inc. The National Stock Number assigned to this part is 5331014871129, 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 BUNA-N 0.284X0.028 70 BN.