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 5910-01-008-6233
NSN 5925-01-420-6317
NSN 5910-00-930-8908
NSN 5935-01-431-7047
NSN 5945-01-462-5595
NSN 5996-01-342-8293
NSN 4140-00-952-4047
NSN 5855-01-173-0808
NSN 5965-01-498-1133
NSN 6650-00-356-8405
NSN 4140-01-372-6078
NSN 5855-01-301-0158