Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number B30-004283 found under Lamp Incandescent by Sonicraft Inc. The National Stock Number assigned to this part is 6240009880522, 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 B30-004283.