Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number EFR-150-ILK found under Light Bulb Lamp by Olympus America Inc. The National Stock Number assigned to this part is 5920015310014, and the Federal Supply Class is 5920 Fuses Arresters Absorbers And Protector. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like EFR-150-ILK.