Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number ISSD6RU4 found under Reducer Tube by Ssp Fittings Corp. The National Stock Number assigned to this part is 4730007932732, 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 ISSD6RU4.