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 4140-01-361-9198
NSN 5998-01-476-5651
NSN 5945-01-413-8612
NSN 6610-00-175-7250
NSN 5960-01-228-8858
NSN 5945-00-499-3574
NSN 5945-01-183-9280
NSN 5998-01-485-2085
NSN 6130-00-152-4266
NSN 6645-00-780-5260
NSN 6150-00-151-6771
NSN 5965-01-312-1630