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 5998-00-075-6778
NSN 6320-00-394-8458
NSN 5920-01-407-0406
NSN 5945-01-427-3790
NSN 5895-00-974-3710
NSN 5999-01-452-0692
NSN 6105-01-006-1383
NSN 6645-01-436-7381
NSN 6135-00-686-4777
NSN 6220-00-629-9271
NSN 6650-01-085-7873
NSN 6150-00-644-8745