Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number OC9200B 31-200 found under Tape Measuring by Cooper Industries Inc. The National Stock Number assigned to this part is 5210005292312, and the Federal Supply Class is 5210 Measuring Tools Craftsmens. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like OC9200B 31-200.