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 5895-00-215-0179
NSN 5910-01-543-6551
NSN 6645-01-086-7668
NSN 5920-01-490-2733
NSN 5945-00-907-4048
NSN 5930-01-095-4691
NSN 5998-00-063-3580
NSN 5965-01-415-2898
NSN 5935-01-360-5090
NSN 5998-00-839-7647
NSN 5835-01-620-0675
NSN 6240-00-274-4028