Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number ALT 688C found under Cylinder Compressed Gas Air Brea by Structural Composites Industries Llc. The National Stock Number assigned to this part is 8120016118528, and the Federal Supply Class is 8120 Commercial And Industrial Gas Cylinders. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like ALT 688C.