Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number B-0 250F-24IN. STEM 1 2NPT found under Thermometer Self Indicating Bime by Reotemp Instrument Corporation. The National Stock Number assigned to this part is 6685001905953, 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 B-0 250F-24IN. STEM 1 2NPT.