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 5996-00-240-0010
NSN 6145-00-347-1171
NSN 5965-01-061-6871
NSN 5945-01-110-4130
NSN 5895-01-556-3674
NSN 5985-00-506-3096
NSN 4140-00-872-6316
NSN 5960-01-141-6489
NSN 2925-01-030-6580
NSN 2925-00-480-9068
NSN 6240-01-224-6941
NSN 5925-01-479-9392