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 7035-00-616-4410
NSN 6105-01-204-2920
NSN 6610-01-325-6767
NSN 5998-00-704-4404
NSN 6150-01-245-4310
NSN 5935-01-579-0262
NSN 5930-00-910-5331
NSN 5915-00-492-7867
NSN 6130-01-440-9969
NSN 5895-01-224-5087
NSN 6610-01-065-6057
NSN 2925-01-077-3310