Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 99-6031937 found under Shield Heat Half by Nato Stock Number Assigned By An. 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 99-6031937.