Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number HMX3 16-5.5-1.000 found under Core Material Cellular Structura by Hexcel Corporation. The National Stock Number assigned to this part is 5680012965990, and the Federal Supply Class is 5680 Miscellaneous Construction Materials. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like HMX3 16-5.5-1.000.