A relatively thin metallic item, having a concave or cupped contour, designed to effect its own seal by compression against the circumference of a hole. It is used as a blowout plug in boilers, engines, and the like to relieve the pressure created by the expansion of fluids caused by heat or freezing.
Classification: Parts for steam or other vapor generating boilers and super-heated water boilers, except heat exchangers
NSN 5999-01-436-1445
NSN 5985-00-135-3776
NSN 5950-01-022-0622
NSN 6110-01-247-4192
NSN 5945-01-201-4264
NSN 6135-00-900-2139
NSN 6240-01-447-5091
NSN 7035-00-153-3826
NSN 5998-00-392-1996
NSN 5835-00-757-3558
NSN 5935-01-612-5747
NSN 6320-00-405-2348