Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number B68-99173 found under Gauge Glass Assembly by Chromalox Corp. The National Stock Number assigned to this part is 5210010234238, 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 B68-99173.