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 5985-00-860-6172
NSN 5975-01-634-0678
NSN 6110-01-116-3397
NSN 6220-01-420-1856
NSN 5965-01-178-2367
NSN 5855-00-987-1171
NSN 4140-00-781-4745
NSN 5920-00-915-1206
NSN 6105-01-507-7754
NSN 5910-01-400-4077
NSN 5925-01-645-2789
NSN 6145-01-328-7991