Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number RW 1630 1 4 found under Hose Nonmetallic by Armstrong Industrial Hose Products. The National Stock Number assigned to this part is 4720011517961, and the Federal Supply Class is 4720 Hose And Flexible Tubing. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like RW 1630 1 4.