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 6320-01-098-2503
NSN 6685-01-634-0611
NSN 6650-01-297-4376
NSN 5998-00-753-7856
NSN 5920-01-297-5895
NSN 5975-00-456-0627
NSN 6110-00-655-2333
NSN 5975-01-385-3951
NSN 5910-01-009-6378
NSN 6645-01-152-1092
NSN 5895-00-261-3419
NSN 6220-00-137-8289