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 2925-00-211-4469
NSN 5960-00-081-9255
NSN 5905-01-177-2266
NSN 6610-00-891-6370
NSN 6150-00-223-9761
NSN 5935-01-357-2062
NSN 6610-01-400-3880
NSN 6645-01-005-8622
NSN 5925-01-594-1873
NSN 6610-01-387-5630
NSN 6110-01-650-0183
NSN 6650-00-583-1735