Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 56SIZE2 found under Cup Oil Lubricating by Bowen Products Corp. The National Stock Number assigned to this part is 4730002330773, 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 56SIZE2.