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 5998-01-557-5375
NSN 2925-01-474-3363
NSN 5945-01-553-0313
NSN 6610-01-444-6813
NSN 5920-00-052-7172
NSN 6220-00-469-3292
NSN 5910-01-585-5587
NSN 5975-00-889-8620
NSN 2925-00-332-1361
NSN 4140-01-605-1414
NSN 6610-01-226-7612
NSN 5975-00-149-7647