Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 250-000-12C found under Thermometer Self Indicating by Koehler Mfg Co. The National Stock Number assigned to this part is 6685014922039, 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 250-000-12C.