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 5990-01-054-3332
NSN 6145-00-291-5388
NSN 5990-00-366-0112
NSN 5990-00-998-6193
NSN 5950-00-524-2274
NSN 6320-01-652-3806
NSN 5975-00-675-8661
NSN 4140-00-727-2440
NSN 4140-01-257-2676
NSN 6610-01-618-4746
NSN 5920-01-123-9854
NSN 7035-01-448-4740