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 6240-01-181-4474
NSN 5920-01-207-3598
NSN 5925-01-534-7749
NSN 5960-01-235-5358
NSN 5855-01-233-2767
NSN 5935-01-647-9572
NSN 5985-00-935-5074
NSN 6105-01-430-9736
NSN 5915-00-849-9419
NSN 5935-01-172-8855
NSN 5895-01-068-7269
NSN 6145-01-249-6717