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 7035-01-085-9427
NSN 6220-01-277-5812
NSN 5945-01-186-0809
NSN 4140-01-481-4237
NSN 5895-00-103-2373
NSN 5855-00-444-2298
NSN 5855-01-471-3162
NSN 5998-01-442-5098
NSN 6240-00-881-9624
NSN 6130-01-089-8154
NSN 6320-00-643-0958
NSN 5960-01-431-4291