Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 8551-37 found under Adapter Straight Flange To Pipe by Syltone Industries Llc. The National Stock Number assigned to this part is 4730002151859, 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 8551-37.