Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 20774 found under Lamp Incandescent by Tiffin Parts Llc. The National Stock Number assigned to this part is 6240006430687, 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 20774.