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 6320-01-390-5385
NSN 5945-01-072-5721
NSN 5930-01-474-5487
NSN 6105-01-442-3465
NSN 6130-01-328-8108
NSN 6645-00-010-3054
NSN 5920-01-120-4300
NSN 6105-01-634-0322
NSN 5935-01-256-1117
NSN 6150-01-464-7618
NSN 5985-01-142-2298
NSN 5945-00-197-4296