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 6240-00-672-2759
NSN 5905-01-125-7968
NSN 6320-01-019-1028
NSN 5935-01-172-1354
NSN 6610-00-506-1977
NSN 5998-01-371-1229
NSN 7035-01-102-8111
NSN 5895-00-441-9617
NSN 5935-01-420-1014
NSN 5985-01-443-1229
NSN 6150-01-039-2564
NSN 5920-01-594-9961