Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 5589CSLB2AB found under Switch Push by L 3 Communications Essco Inc. The National Stock Number assigned to this part is 5930013993748, and the Federal Supply Class is 5930 Switches. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 5589CSLB2AB.