Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number NL7977 4032 found under Lamp Indicating by National Electronics Corp. The National Stock Number assigned to this part is 6240007858398, and the Federal Supply Class is 6240 Electric Lamps. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like NL7977 4032.