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 6110-01-368-4899
NSN 6105-01-241-3913
NSN 6135-01-477-5259
NSN 4140-01-327-2844
NSN 5915-01-231-5282
NSN 6150-01-492-2006
NSN 5855-01-602-9653
NSN 5895-00-153-0086
NSN 6610-00-437-5681
NSN 6320-01-006-6138
NSN 5925-00-355-6124
NSN 6135-01-487-6275