Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 7505-3 found under by L 3 Communications Westwood. The National Stock Number assigned to this part is 5831002790276, and the Federal Supply Class is 5831 Intercommunication And Public Address Systems Airborne. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 7505-3.