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 6220-00-383-7354
NSN 5935-00-152-0890
NSN 5920-01-535-6498
NSN 6240-00-465-2985
NSN 4140-00-605-0396
NSN 5985-01-302-0863
NSN 5915-00-079-3696
NSN 7035-01-331-5614
NSN 5930-01-473-9846
NSN 6320-01-484-7734
NSN 5835-01-102-4451
NSN 6135-01-581-8163