Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number COR-HS-740-307 found under Light Marker Distress by Ops Core Inc. The National Stock Number assigned to this part is 6230016476011, and the Federal Supply Class is 6230 Electric Portable And Hand Lighting Equipment. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like COR-HS-740-307.