Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number TF40X20-4X1-5 found under Washer Spring Tensi by Schnorradolf Gmbh Cokg. 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 TF40X20-4X1-5.