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 5935-01-157-9615
NSN 6145-00-291-5388
NSN 6135-00-577-8429
NSN 5960-01-443-9681
NSN 5975-01-418-8360
NSN 5998-00-488-5579
NSN 6650-01-433-1911
NSN 5895-01-135-9853
NSN 6645-00-183-8812
NSN 4140-00-354-4117
NSN 6220-01-165-0256
NSN 6130-01-569-7578