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 5960-00-173-4760
NSN 6645-00-181-1877
NSN 4140-00-393-1707
NSN 5895-01-244-0402
NSN 5910-00-008-8789
NSN 5905-01-366-7865
NSN 5999-01-567-8101
NSN 5935-01-394-9513
NSN 5910-01-125-8194
NSN 5905-00-514-1984
NSN 6240-01-505-2777
NSN 6610-01-623-6228