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 5990-00-181-2220
NSN 2925-01-448-1277
NSN 5930-00-063-8500
NSN 6220-00-498-8098
NSN 5998-00-248-8587
NSN 6645-01-195-6207
NSN 7035-01-467-8921
NSN 5895-01-643-6222
NSN 5935-00-372-5261
NSN 5835-01-123-8305
NSN 2925-01-583-0736
NSN 6130-00-848-5727