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 5835-00-474-6085
NSN 6645-00-906-1769
NSN 6645-01-519-2220
NSN 6685-01-556-9735
NSN 6320-01-425-1417
NSN 5855-01-038-2189
NSN 5915-01-242-9686
NSN 5925-01-611-8917
NSN 5998-01-501-6216
NSN 5990-01-395-4194
NSN 6105-00-173-8850
NSN 5835-01-264-8782