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 6645-01-567-2968
NSN 6220-01-496-1925
NSN 6650-00-224-3223
NSN 5999-00-960-8232
NSN 6320-01-519-8767
NSN 5960-01-413-3877
NSN 6610-01-457-1974
NSN 5950-01-531-5525
NSN 5925-01-390-3993
NSN 5935-01-383-6748
NSN 5915-01-175-2857
NSN 6135-01-424-4940