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 5920-00-011-4995
NSN 6620-01-365-1499
NSN 5990-01-492-6575
NSN 6240-01-353-3220
NSN 7035-00-803-3056
NSN 5999-01-341-6784
NSN 6220-00-086-5156
NSN 5996-01-223-2702
NSN 6240-00-813-0100
NSN 6150-01-448-9858
NSN 5950-01-284-4130
NSN 5920-00-003-2940