Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number WRM1939 found under Lamp Incandescent by Whelen Engineering Company Inc. The National Stock Number assigned to this part is 6240002255128, 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 WRM1939.