Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number REG 0043 found under Regulator Temperature And Pressu by Bauer Compressors Inc. The National Stock Number assigned to this part is 4820016666009, 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 REG 0043.