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 5915-00-801-6317
NSN 5920-01-443-0523
NSN 5930-01-199-6352
NSN 5930-01-032-8332
NSN 6110-00-971-2035
NSN 5910-01-304-2021
NSN 6650-01-546-7632
NSN 5895-00-088-8558
NSN 5935-00-529-0319
NSN 6145-01-023-7719
NSN 5915-00-078-9574
NSN 6320-01-366-5157