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 5915-01-603-4913
NSN 5945-01-200-4852
NSN 5935-01-481-3586
NSN 6610-01-186-4106
NSN 5920-01-015-4486
NSN 6320-00-905-0543
NSN 5996-01-192-7875
NSN 6110-01-099-6893
NSN 6150-01-331-9043
NSN 6610-01-409-1781
NSN 5920-01-138-3572
NSN 6135-00-553-7995