Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number NAS1201B6A found under Fastener Bead Chain by F And C Sales Inc. The National Stock Number assigned to this part is 4030001365741, and the Federal Supply Class is 4030 Fittings For Rope Cable And Chain. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like NAS1201B6A.