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 6610-00-204-6792
NSN 5999-00-940-8374
NSN 5925-00-804-5814
NSN 5965-01-073-1014
NSN 5965-00-132-0229
NSN 5835-00-411-0591
NSN 5910-01-370-6341
NSN 5990-01-227-0660
NSN 5915-01-411-9412
NSN 5895-01-446-6215
NSN 5985-01-096-4403
NSN 5925-01-646-0722