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 6105-01-550-8842
NSN 6145-01-625-8725
NSN 5920-01-189-0115
NSN 6110-01-180-0311
NSN 5960-01-406-3672
NSN 4140-01-630-1360
NSN 6240-00-263-0549
NSN 5985-01-512-9801
NSN 5910-00-553-7367
NSN 5985-01-399-0307
NSN 6130-01-476-9714
NSN 5920-00-539-6920