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 6220-01-258-5466
NSN 5998-00-647-1225
NSN 5990-00-222-9899
NSN 5915-01-600-1058
NSN 5960-01-358-2832
NSN 6650-01-351-4544
NSN 5999-00-293-9449
NSN 6610-01-431-8575
NSN 4140-01-625-2804
NSN 6610-00-184-0833
NSN 6130-01-339-6831
NSN 6645-01-366-5033