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 6220-00-916-9766
NSN 6150-01-406-3431
NSN 6620-00-522-6693
NSN 6150-00-187-7287
NSN 6145-00-960-9233
NSN 6620-00-948-3801
NSN 5905-01-392-9575
NSN 5930-01-376-7250
NSN 6135-00-369-2368
NSN 5915-01-212-8761
NSN 2925-00-185-1618
NSN 5920-01-460-4290