Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number D40 0011 ITEMS 2 5 16 21 26 And 30 found under Parts Kit Seal Repl by Danco Valve Company. The National Stock Number assigned to this part is 5330016057123, and the Federal Supply Class is 5330 Packing And Gasket Materials. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like D40 0011 ITEMS 2 5 16 21 26 And 30.