Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 420180 found under Washer Spring Tensi by Lucas France Sa Div Aerospace France. The National Stock Number assigned to this part is 5310121566975, and the Federal Supply Class is 5310 Nuts And Washers. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 420180.