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 5935-01-602-4307
NSN 5905-00-173-7148
NSN 5965-00-051-6434
NSN 6105-01-303-7027
NSN 5999-01-165-3198
NSN 5925-01-175-6082
NSN 5905-01-076-4008
NSN 5990-00-366-0112
NSN 5950-00-529-0264
NSN 5960-01-325-2241
NSN 5930-01-596-8149
NSN 5985-00-479-7362