Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 25-21039-6 found under Blanket by Hitco Carbon Composites Inc. The National Stock Number assigned to this part is 5620000998568, and the Federal Supply Class is 5620 Tile Brick And Block. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 25-21039-6.