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 5990-00-072-5450
NSN 6110-00-185-8147
NSN 6320-00-831-2227
NSN 5910-00-274-3189
NSN 6145-01-538-6256
NSN 6240-00-897-1209
NSN 5905-00-768-3972
NSN 5960-01-077-6062
NSN 6650-00-244-5648
NSN 6240-01-072-2278
NSN 5910-01-295-2840
NSN 5915-01-307-8540