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 6130-01-073-9744
NSN 5895-00-360-0117
NSN 6645-01-338-9152
NSN 6320-01-119-3935
NSN 5895-00-950-1957
NSN 6220-00-987-5638
NSN 4140-01-457-0942
NSN 5925-01-021-9200
NSN 6150-01-477-9586
NSN 6110-01-081-8599
NSN 5920-00-243-3787
NSN 5998-01-381-1251