Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number US630L found under Microphone Dynamic by University Sound Inc. The National Stock Number assigned to this part is 5965003392743, 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 US630L.