Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number P33-042-003 found under by On Site Gas Systemsinc. The National Stock Number assigned to this part is 4720016143966, 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 P33-042-003.