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 5935-01-241-3843
NSN 6240-01-224-4125
NSN 6220-01-370-4034
NSN 5915-00-234-4286
NSN 5925-01-551-6292
NSN 5998-01-100-0547
NSN 6650-01-521-5903
NSN 5960-01-103-3150
NSN 2925-00-078-0525
NSN 6610-01-023-1918
NSN 5855-01-449-4580
NSN 6105-00-161-1834