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 4140-01-578-9005
NSN 5930-01-205-8057
NSN 7035-00-096-9986
NSN 5835-00-170-5238
NSN 5935-01-500-2283
NSN 5998-01-624-1839
NSN 5920-00-106-1454
NSN 5960-01-135-5639
NSN 7035-01-433-3547
NSN 5998-01-024-1150
NSN 5855-01-428-9456
NSN 7035-01-330-3768