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 5835-00-985-1444
NSN 6130-00-105-5187
NSN 6645-00-780-5260
NSN 5835-00-302-5296
NSN 6610-01-152-2821
NSN 2925-01-100-3694
NSN 5930-01-331-3316
NSN 5920-01-007-8775
NSN 5975-01-634-0678
NSN 6685-01-546-8147
NSN 6135-01-090-5365
NSN 4140-01-562-9508