Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number FT921 found under Adapter Straight Flange To Hose by Flexible Technologies Inc. The National Stock Number assigned to this part is 4730000016146, 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 FT921.