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 5965-01-280-3772
NSN 5835-01-359-2575
NSN 2925-01-484-2775
NSN 6240-01-350-3533
NSN 2925-00-526-4541
NSN 6650-01-093-1803
NSN 6135-01-017-3001
NSN 5920-01-256-0287
NSN 5990-01-254-3197
NSN 5998-01-112-0520
NSN 5920-01-144-1500
NSN 5960-00-300-2358