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 6220-00-396-0039
NSN 6685-01-441-9378
NSN 6240-01-168-6185
NSN 6610-00-726-0247
NSN 2925-01-502-5896
NSN 5925-01-414-9210
NSN 5935-01-250-5075
NSN 5945-01-388-7497
NSN 4140-01-273-0196
NSN 5915-01-571-5894
NSN 7035-00-567-7511
NSN 5960-01-553-4557