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 6240-00-737-2775
NSN 6145-01-129-4580
NSN 6130-00-928-2251
NSN 5999-00-815-4421
NSN 6240-01-121-8116
NSN 4140-00-603-5074
NSN 5950-01-063-7181
NSN 5930-01-294-9728
NSN 6135-00-351-8606
NSN 5996-00-217-2654
NSN 6620-01-660-5908
NSN 5930-01-614-6836