Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 56-8995 found under Adapter Straight Tube To Boss by The Boeing Company. The National Stock Number assigned to this part is 4730008164793, 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 56-8995.