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 5960-01-628-2760
NSN 5935-01-312-7564
NSN 5999-01-068-3257
NSN 5935-00-834-0258
NSN 6610-01-188-8163
NSN 5925-01-581-0625
NSN 6110-01-154-7066
NSN 6240-01-213-0143
NSN 6320-01-476-7702
NSN 6620-00-186-8220
NSN 6130-01-390-1815
NSN 6645-01-612-6885