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 5915-00-583-4970
NSN 6150-00-759-1764
NSN 5985-01-387-6155
NSN 5930-00-822-5606
NSN 4140-01-255-0282
NSN 6130-01-505-5367
NSN 5998-00-952-2562
NSN 2925-01-026-1000
NSN 6220-00-244-5040
NSN 4140-00-104-7323
NSN 6620-01-398-8986
NSN 6130-01-137-8378