Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 635-038 found under Hose Nonmetallic by Hammond Air Conditioning Ltd. The National Stock Number assigned to this part is 4720200019086, 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 635-038.