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 5915-01-283-6173
NSN 6645-01-328-5583
NSN 2925-00-562-9866
NSN 7035-00-981-7216
NSN 5920-01-293-9921
NSN 5920-01-657-5856
NSN 6610-01-576-8955
NSN 5895-01-201-7700
NSN 6135-01-462-1135
NSN 6320-01-578-6006
NSN 5965-01-429-0881
NSN 2925-01-101-4655