Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 5PQ5240-1 found under Lamp Mercury Vapor by Siemens Corp. The National Stock Number assigned to this part is 6240123176520, 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 5PQ5240-1.