This is a zinc-plated brass Humidty Indicator Plug with a glass window. Furnished with gasket, gasket retainer and nut. It may be installed in container through a 0.515 in. (13.1 mm) diameter hole. For optional single or multiple spot discs, refer to the Color-Change Discs page. Suffix numbers specify optional discs.  Humidity discs are not field replaceable.

 Weight: 0.08 lbs. (36 grams)

Maximum Internal Pressure: 10 psi TA371 (not shown) — Same as TA370, except without nut or gasket retainer.  Can be mounted in a .5000-20 UNF-2B threaded boss. TA372 (not shown) — Similar to TA370, except with retained o-ring seal and lock nut.  Mounts through a 0.515 in. (13.1 mm) diameter hole. TA373 (not shown) — Same as TA372, except without lock nut.  For mounting in a .5000-20 UNF-2B threaded boss.

The TA370 series is appropriate for use on NEMA 1, 2, 3, 3R, 3S, 4, 5, 6, 12, 12K, and 13 enclosures, as well as IP66/IP67 enclosures.  This item may also be appropriate for use on other NEMA or IP enclosures, depending upon the application.