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 6650-01-650-5771
NSN 5855-00-973-5717
NSN 6130-01-519-7875
NSN 5998-01-366-6224
NSN 6685-01-449-2165
NSN 5835-00-479-0464
NSN 6145-01-242-9211
NSN 5999-01-521-3824
NSN 5975-00-369-7306
NSN 6145-01-377-5130
NSN 5935-00-285-2767
NSN 5930-01-111-9975