Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number T82-5 found under Valve Ball Check by Zenith Fuel Systems Inc. The National Stock Number assigned to this part is 4820004198915, 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 T82-5.