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 5855-01-294-2804
NSN 5960-01-530-0581
NSN 6220-01-596-1414
NSN 5945-00-605-9703
NSN 5925-01-549-6193
NSN 5998-00-060-5925
NSN 5990-01-621-4710
NSN 6610-01-329-0199
NSN 5985-01-278-9329
NSN 5925-00-553-2123
NSN 5945-00-106-0332
NSN 6650-01-412-4217