Hewitt Temperature Sender Part #012-123 140-320 Degrees F Hewitt Temperature Sender Part #012-123 Reads, 140 - 320 Degrees F, 1/8"-27NPT Thread. "Matched" Device, Compatible with all Hewitt Liquid Temperature Gauges, reading 140 to 320F NPT. List - $21.00 Threads are Self-Sealing, Use of Sealing Compounds... $16.00