Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number SM-B-183665 found under by Freeman Manufacturing And Supply. The National Stock Number assigned to this part is 5821003272353, and the Federal Supply Class is 5821 Radio And Television Communication Equipment Airborne. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like SM-B-183665.