Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 143G186-15 found under Lamp Incandescent by Dresser Marion Div. The National Stock Number assigned to this part is 6240001557900, 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 143G186-15.