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 5930-01-253-4099
NSN 6645-00-243-9470
NSN 5920-01-400-3548
NSN 5905-01-360-4263
NSN 6110-00-137-9544
NSN 5999-01-285-4319
NSN 6220-01-172-9369
NSN 5920-01-400-2558
NSN 5915-01-553-2327
NSN 6685-01-100-1672
NSN 4140-01-651-7192
NSN 6130-00-828-8823