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 6650-01-603-3183
NSN 2925-01-647-7225
NSN 5965-01-170-2812
NSN 6620-00-963-1319
NSN 5996-00-724-3812
NSN 5835-00-725-2087
NSN 6110-01-214-5185
NSN 5915-01-417-4205
NSN 6610-01-515-7869
NSN 5910-01-440-7916
NSN 5915-00-247-2127
NSN 6110-01-316-8638