Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 72-81217 found under Valve Ball by Itw Industrial Finishing. The National Stock Number assigned to this part is 4820013134135, and the Federal Supply Class is 4820 Valves Nonpowered. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 72-81217.