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 6220-01-145-1183
NSN 5998-01-452-1298
NSN 6220-00-001-2759
NSN 5855-00-189-6066
NSN 5990-01-037-9801
NSN 6130-01-222-2819
NSN 5985-01-027-1829
NSN 5925-00-758-7956
NSN 4140-00-580-8508
NSN 5950-00-865-2032
NSN 6145-01-583-3909
NSN 6130-01-650-1738