Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number BO-23559ISSUE7 found under Switch Rotary by American Telephone And Telegraph Co. The National Stock Number assigned to this part is 5930002637835, 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 BO-23559ISSUE7.