Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number ENS1J B28 L00256 found under Switch Rotary by Bourns Inc. The National Stock Number assigned to this part is 5930014962031, 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 ENS1J B28 L00256.