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 6240-01-370-5242
NSN 5920-01-315-9534
NSN 5895-00-446-2956
NSN 5998-00-446-4109
NSN 5835-00-969-5771
NSN 6145-00-177-2369
NSN 5935-01-132-1583
NSN 2925-01-100-3694
NSN 5996-01-250-1364
NSN 6240-01-584-1829
NSN 5920-00-805-7132
NSN 5998-01-167-8402