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 2925-01-218-5556
NSN 5945-01-389-1895
NSN 5935-00-939-4536
NSN 5990-01-500-5412
NSN 6645-01-327-2389
NSN 5998-01-476-0844
NSN 5960-01-509-8779
NSN 5965-01-227-4517
NSN 6135-00-866-2311
NSN 5915-01-632-1160
NSN 5910-01-327-4140
NSN 6220-01-139-0126