Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number GL BR40 18 NPF found under Lamp Fluorescent by Mitor Industries Inc. The National Stock Number assigned to this part is 6240014659710, 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 GL BR40 18 NPF.