Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 61CA-4-OXY found under Nut Tube Coupling by Zwick Energy Researach Organization. The National Stock Number assigned to this part is 4730014533595, and the Federal Supply Class is 4730 Hose Pipe Tube Lubrication And Railing Fittings. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 61CA-4-OXY.