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 6105-00-891-3568
NSN 6685-00-276-9889
NSN 6105-01-487-4229
NSN 5935-00-203-5852
NSN 6220-01-044-0708
NSN 5920-01-228-8697
NSN 5920-01-045-1484
NSN 5945-00-912-4492
NSN 5998-01-124-9726
NSN 5996-00-333-5182
NSN 4140-01-149-4803
NSN 6685-01-522-9561