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 6240-00-137-9540
NSN 5950-01-464-9962
NSN 5915-00-423-7196
NSN 5960-01-595-6515
NSN 5999-01-074-0382
NSN 6220-01-282-6572
NSN 6150-01-241-9352
NSN 7035-01-592-2176
NSN 6320-01-359-3921
NSN 5935-01-020-8274
NSN 5996-01-534-6088
NSN 6110-01-534-6435