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 6135-01-369-8146
NSN 5855-01-334-6594
NSN 5999-00-050-0050
NSN 5930-01-163-0442
NSN 5960-00-172-5264
NSN 5835-00-113-6090
NSN 4140-00-032-5739
NSN 6130-01-642-3091
NSN 6110-01-467-6927
NSN 5920-01-236-6780
NSN 6135-01-142-6456
NSN 5915-01-399-7278