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 6645-00-139-2972
NSN 6610-00-420-3089
NSN 5990-01-374-3877
NSN 6320-01-240-4637
NSN 5950-01-457-3587
NSN 6610-01-168-7943
NSN 5935-00-270-6698
NSN 5930-00-164-2713
NSN 5996-01-411-6195
NSN 6105-00-392-1919
NSN 6320-00-456-0836
NSN 5925-01-332-8371