Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number ND8328 found under Filter Acoustical by Oil States Industries Inc. The National Stock Number assigned to this part is 5965014815267, and the Federal Supply Class is 5965 Headsets Handsets Microphones And Speakers. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like ND8328.