Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 34A0428020-65 found under Lamp Flashtube by Whelen Engineering Company Inc. The National Stock Number assigned to this part is 6240013918749, 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 34A0428020-65.