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 6110-01-366-1402
NSN 5910-00-306-5980
NSN 5935-01-224-6228
NSN 5950-01-076-4772
NSN 6240-01-426-5581
NSN 5920-01-460-9798
NSN 5998-01-117-4621
NSN 5905-01-367-2526
NSN 5996-01-555-4224
NSN 6650-01-527-5182
NSN 5996-01-052-4027
NSN 5950-01-396-7598