Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number BA 04 1 N A B 055WB found under Switch Rotary by Electro Switch Corp. The National Stock Number assigned to this part is 5930011497004, 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 BA 04 1 N A B 055WB.