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 6130-00-872-1990
NSN 6645-01-514-7901
NSN 5975-01-484-7894
NSN 6145-00-884-8112
NSN 5960-01-056-4982
NSN 6145-01-514-0283
NSN 6110-01-306-9235
NSN 5999-01-398-8924
NSN 6145-01-541-4793
NSN 6610-00-681-0590
NSN 2925-01-443-1748
NSN 6240-01-343-0065