Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 21694 found under Nipple Pipe by Clemco Industries Corp. The National Stock Number assigned to this part is 4730016450255, 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 21694.