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 5998-01-256-1043
NSN 5915-00-954-6807
NSN 6650-01-138-1712
NSN 5985-01-506-5380
NSN 5930-00-768-0970
NSN 6320-00-343-1798
NSN 5915-01-196-6016
NSN 6645-00-226-2270
NSN 5925-01-569-2981
NSN 5895-01-200-5093
NSN 4140-00-100-4563
NSN 5996-01-116-2523