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 5950-01-580-3895
NSN 5915-01-398-0633
NSN 5905-01-546-4478
NSN 2925-01-430-4206
NSN 5925-00-108-4948
NSN 6220-01-243-8661
NSN 5998-01-592-3167
NSN 5835-01-481-4204
NSN 6150-01-460-7054
NSN 6240-01-304-2798
NSN 6320-01-487-0336
NSN 6610-00-664-2190