Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number RRF221 found under Barbed Wire by United States Steel Corporation. The National Stock Number assigned to this part is 5660002248663, and the Federal Supply Class is 5660 Fencing Fences Gates And Components. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like RRF221.