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 5945-01-068-9973
NSN 5950-00-344-8313
NSN 5910-01-324-0987
NSN 5855-01-051-4143
NSN 5945-00-252-5680
NSN 5835-01-167-1824
NSN 5975-01-425-1986
NSN 6145-01-657-8785
NSN 6645-00-958-5299
NSN 5985-01-384-3773
NSN 5925-00-142-9991
NSN 5935-01-228-2425