Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number WK4 U found under Terminal Board by Schneider Electric Inc. The National Stock Number assigned to this part is 5940014449727, and the Federal Supply Class is 5940 Lugs Terminals And Terminal Strips. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like WK4 U.