Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 100A19 FR HD-3.5M found under Lamp Incandescent by Westron Corporation. The National Stock Number assigned to this part is 6240013136849, 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 100A19 FR HD-3.5M.