Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number WVTB-70-1-80MM PN4 found under O Ring by Naf Ab. The National Stock Number assigned to this part is 5331014253034, 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 WVTB-70-1-80MM PN4.