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 5945-01-466-7914
NSN 6110-00-456-2058
NSN 5975-01-065-0467
NSN 6620-01-336-8670
NSN 5960-01-056-6705
NSN 5930-00-220-1861
NSN 5999-01-055-7297
NSN 6685-01-263-3552
NSN 6620-01-192-3927
NSN 5960-01-553-4557
NSN 5935-00-982-9284
NSN 5925-01-060-0405