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 6320-01-393-7022
NSN 6220-01-250-2376
NSN 5895-01-477-3322
NSN 6145-01-462-8123
NSN 5999-00-885-4599
NSN 5996-01-134-2026
NSN 5985-00-540-9460
NSN 6320-01-527-0211
NSN 5935-01-384-2790
NSN 6150-01-320-9018
NSN 6610-00-639-3615
NSN 6110-01-306-5193