Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number W004020001 found under Washer Spring Tensi by Lips Proptech B V. The National Stock Number assigned to this part is 5310121564959, 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 W004020001.