Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number PD100PC21 found under Valve Regulating Te by Bauer Inc. The National Stock Number assigned to this part is 4820006472280, 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 PD100PC21.