Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number E257849-12 found under Shield Heat Half by Bae Systems Operations Ltd. The National Stock Number assigned to this part is 1560004527998, and the Federal Supply Class is 1560 Airframe Structural Components. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like E257849-12.