Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number TA25000-83 found under Parts Kit Valve Reg by Rostra Vernatherm Llc. The National Stock Number assigned to this part is 4820011640175, 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 TA25000-83.