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 5925-01-145-6444
NSN 5930-01-658-5486
NSN 6610-01-607-4525
NSN 5965-01-258-5328
NSN 5910-00-221-2889
NSN 5930-01-502-7156
NSN 7035-01-491-1464
NSN 5998-01-100-1925
NSN 4140-01-578-6007
NSN 6220-01-359-8322
NSN 6685-01-485-3110
NSN 6130-01-367-4582