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 5996-01-188-7934
NSN 5920-01-423-8595
NSN 5835-01-406-4066
NSN 6620-00-155-2608
NSN 5925-01-624-8033
NSN 5998-01-197-0185
NSN 6650-01-222-1749
NSN 5965-01-188-7267
NSN 4140-01-330-7293
NSN 5965-01-605-0090
NSN 5915-00-540-7437
NSN 5925-01-416-2528