Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number RX-50 found under Twine Fibrous by Du Pont De Nemours Deutschland. The National Stock Number assigned to this part is 4020012939505, and the Federal Supply Class is 4020 Fiber Rope Cordage And Twine. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like RX-50.