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 6620-01-621-0719
NSN 5910-00-960-7464
NSN 5915-00-296-7497
NSN 6150-01-427-3764
NSN 5915-00-359-3271
NSN 6610-00-252-3405
NSN 5905-00-211-3926
NSN 6620-00-273-8735
NSN 5945-00-889-9948
NSN 6645-00-199-8526
NSN 6645-01-310-2949
NSN 6645-01-191-0107