Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number R2605S found under Tube Oil Cooler by Olin Corporation. The National Stock Number assigned to this part is 4710005670272, 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 R2605S.