Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number DC 100 found under Seal Nonmetallic St by Armstrong World Industries Inc. The National Stock Number assigned to this part is 5330010459607, and the Federal Supply Class is 5330 Packing And Gasket Materials. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like DC 100.