Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 123B366 found under End Cover Transmitt by Avionics Specialist Inc. The National Stock Number assigned to this part is 6610002392404, and the Federal Supply Class is 6610 Flight Instruments. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 123B366.