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 5998-01-192-9281
NSN 7035-00-760-5479
NSN 5895-01-432-0697
NSN 6645-01-320-2661
NSN 5925-00-418-3811
NSN 5935-00-276-9413
NSN 6645-00-198-8450
NSN 5910-00-149-6555
NSN 5996-00-127-8824
NSN 5910-00-160-3837
NSN 5965-00-448-9923
NSN 5855-01-393-2455