Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 2A9-2 found under Indicator Temperature Thermocoup by Westberg Mfg Inc. The National Stock Number assigned to this part is 6685015818497, and the Federal Supply Class is . Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 2A9-2.