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 5905-01-299-7593
NSN 4140-01-396-4025
NSN 2925-01-168-6253
NSN 5905-01-029-1545
NSN 5835-01-080-7784
NSN 2925-01-197-7864
NSN 5990-00-170-9553
NSN 6220-01-168-7773
NSN 5895-01-583-8575
NSN 7035-01-440-8877
NSN 5895-01-632-8665
NSN 5905-01-627-2013