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 5920-00-305-2867
NSN 5930-01-330-5403
NSN 6150-01-128-9574
NSN 5895-01-047-6825
NSN 6105-01-285-5171
NSN 6130-01-326-4123
NSN 5920-00-520-6169
NSN 5999-00-815-0526
NSN 2925-01-552-4313
NSN 5960-00-529-2704
NSN 5996-00-615-9665
NSN 5996-01-108-8764