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 2925-01-131-0469
NSN 6150-01-551-1191
NSN 5985-00-904-9052
NSN 5998-00-700-0590
NSN 6110-00-869-6337
NSN 6145-01-489-1003
NSN 6240-01-364-2305
NSN 5996-01-370-6593
NSN 6150-01-247-1175
NSN 6110-01-350-3449
NSN 6645-00-078-3354
NSN 5990-01-180-7365