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 5895-00-994-5115
NSN 5960-01-235-8941
NSN 5998-01-200-2050
NSN 4140-00-707-5963
NSN 5996-01-568-4832
NSN 5925-00-764-8349
NSN 5998-00-623-2954
NSN 5835-00-447-1924
NSN 6645-01-372-0126
NSN 2925-01-583-5619
NSN 5915-00-709-0068
NSN 6145-01-578-1561