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 6130-01-581-3153
NSN 5935-00-819-2814
NSN 5930-00-057-9921
NSN 5965-01-030-7253
NSN 5835-01-390-4667
NSN 2925-00-149-0760
NSN 5945-00-408-3765
NSN 6650-01-578-8176
NSN 5985-00-988-9743
NSN 5910-00-974-5636
NSN 4140-01-390-6348
NSN 7035-00-166-0339