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 5895-01-437-6572
NSN 6610-00-463-1866
NSN 5960-00-195-6435
NSN 6610-00-225-9886
NSN 6150-00-463-1123
NSN 5915-00-487-8012
NSN 5965-01-073-9081
NSN 5835-00-931-5568
NSN 5960-01-101-9029
NSN 5925-00-052-5874
NSN 6610-01-648-9997
NSN 5895-01-487-1158