Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 257-990 found under Ferrule Electrical Conductor by Farnell Newark Electronics Component. The National Stock Number assigned to this part is 5940014760329, 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 257-990.