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 5975-00-189-7849
NSN 5905-00-999-0862
NSN 5965-01-073-1014
NSN 5905-01-436-1970
NSN 6145-00-530-8427
NSN 5998-01-053-9418
NSN 7035-00-548-4098
NSN 6145-01-113-8205
NSN 6610-00-681-0590
NSN 6110-01-553-5323
NSN 6110-00-004-8883
NSN 5935-01-197-8129