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 2925-01-455-0974
NSN 5925-00-552-6491
NSN 5855-01-461-7726
NSN 6645-01-061-2916
NSN 5999-01-055-6571
NSN 6130-01-461-3145
NSN 5998-01-168-0539
NSN 5915-00-700-5728
NSN 6130-01-227-5229
NSN 7035-01-263-5463
NSN 5915-01-158-5602
NSN 5930-01-202-4259