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 5930-01-365-4991
NSN 6650-01-120-6231
NSN 5905-00-722-8626
NSN 5905-01-606-9978
NSN 5920-00-330-9392
NSN 5965-01-529-4417
NSN 5930-00-550-1325
NSN 5895-00-991-4582
NSN 5920-01-195-3859
NSN 6240-01-147-5115
NSN 6650-01-024-9554
NSN 5996-01-300-8764