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 5950-01-482-6338
NSN 5915-01-429-8328
NSN 5985-00-341-8252
NSN 6320-01-544-6447
NSN 5930-00-789-7434
NSN 5975-00-159-8876
NSN 5910-01-329-7853
NSN 5990-01-348-2497
NSN 6110-00-492-9392
NSN 6110-00-454-8843
NSN 5855-00-879-7245
NSN 2925-01-218-5556