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 7035-01-497-8958
NSN 5965-01-097-2027
NSN 6610-00-960-9135
NSN 5855-01-391-7077
NSN 6620-01-183-5329
NSN 2925-00-787-2853
NSN 5915-01-441-0096
NSN 6150-00-989-2169
NSN 6645-00-909-2143
NSN 6650-00-009-1427
NSN 5999-00-529-6067
NSN 6685-01-014-7235