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 5935-00-753-5101
NSN 6240-01-401-5340
NSN 7035-01-429-7954
NSN 5895-01-023-8446
NSN 5915-01-570-8305
NSN 5920-01-551-5650
NSN 5975-01-143-0147
NSN 6130-01-469-7497
NSN 6110-00-169-5722
NSN 5910-01-555-0086
NSN 5930-01-216-6114
NSN 6110-00-352-0605