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 6150-00-156-6080
NSN 6130-00-711-0528
NSN 5925-01-157-9548
NSN 5895-00-264-2047
NSN 5998-01-417-8528
NSN 6145-00-310-2598
NSN 6150-00-320-6212
NSN 6610-00-594-6372
NSN 4140-01-445-4935
NSN 5910-01-407-1093
NSN 5930-00-312-2848
NSN 6145-01-575-9273