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 6240-01-197-3888
NSN 2925-00-881-0164
NSN 5998-00-052-4174
NSN 5998-00-845-4873
NSN 5905-00-841-4947
NSN 6145-01-286-1802
NSN 5925-00-103-5153
NSN 5996-01-131-2765
NSN 5930-01-428-4258
NSN 7035-01-633-9537
NSN 5915-01-502-7550
NSN 6150-00-379-4656