Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 51576-003 found under Regulator Voltage by Lucas Aerospace Power Equipment. The National Stock Number assigned to this part is 5963013024449, and the Federal Supply Class is 5963 Electronic Modules. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 51576-003.