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 5999-01-132-2748
NSN 6135-01-433-2062
NSN 5998-00-456-0864
NSN 6105-01-580-1548
NSN 5945-01-241-4069
NSN 6135-00-840-6451
NSN 5998-01-334-7888
NSN 5920-01-068-9353
NSN 5965-00-348-4165
NSN 6620-01-331-6075
NSN 5895-01-090-1259
NSN 5975-00-606-6497