Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 1250-407 found under Washer Spring Tensi by Thales Avionics Sa. The National Stock Number assigned to this part is 5310142988575, 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 1250-407.