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 5920-01-178-5136
NSN 6650-00-904-0085
NSN 6220-01-394-5263
NSN 5930-01-227-2573
NSN 5920-00-150-1148
NSN 5905-00-925-2851
NSN 5950-00-906-0973
NSN 5998-01-319-1637
NSN 6620-01-423-0833
NSN 5930-01-430-9396
NSN 5935-01-387-3692
NSN 6130-00-212-4883