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 4140-01-079-6886
NSN 5930-01-433-1606
NSN 5945-00-481-4281
NSN 5855-00-869-3635
NSN 6610-01-461-8180
NSN 2925-01-215-5022
NSN 6220-01-577-3662
NSN 6240-01-045-3820
NSN 6135-01-210-8715
NSN 5895-00-901-5769
NSN 6145-00-033-2997
NSN 7035-00-703-3535