Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number IRD4251-HV5 found under by Instrument Design Engineering. The National Stock Number assigned to this part is 5980012231996, and the Federal Supply Class is 5980 Optoelectrical Devices And Associated Hardware. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like IRD4251-HV5.