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 5998-01-324-9457
NSN 6135-01-100-3593
NSN 6240-01-009-5827
NSN 6220-01-415-7889
NSN 6145-00-343-5967
NSN 7035-01-602-2524
NSN 5855-01-199-0150
NSN 6645-01-258-5558
NSN 6150-01-169-8038
NSN 5965-00-860-8954
NSN 5935-00-148-0749
NSN 5930-01-204-6638