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 6610-00-119-7819
NSN 5935-01-471-4453
NSN 4140-00-561-9218
NSN 5855-01-519-2486
NSN 6620-00-716-0001
NSN 5895-00-803-6217
NSN 4140-01-349-6885
NSN 5985-00-189-7138
NSN 4140-01-456-5214
NSN 7035-00-134-3143
NSN 6105-00-878-7750
NSN 5990-00-698-3963