Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 2A9-04013 found under Switch Proximity by Oldenburg Group Incorporated. The National Stock Number assigned to this part is 5930013851891, 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 2A9-04013.