Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 457990 found under Tube Oil Scavenge by Horst Engineering And Manufacturing. The National Stock Number assigned to this part is 4710000758285, and the Federal Supply Class is 4710 Pipe Tube And Rigid Tubing. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 457990.