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 6320-00-790-4844
NSN 5950-01-040-5084
NSN 2925-01-643-4472
NSN 5930-01-509-0531
NSN 6645-01-444-3016
NSN 5920-00-336-9055
NSN 5895-01-492-7586
NSN 6110-00-100-4775
NSN 5985-00-351-9456
NSN 7035-01-297-7941
NSN 6130-00-769-9624
NSN 6130-01-429-3503