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 5915-00-398-0677
NSN 5990-00-594-7291
NSN 5960-01-369-8666
NSN 5990-00-963-1799
NSN 6610-01-609-7776
NSN 6610-01-633-8931
NSN 6650-01-086-4814
NSN 5985-00-088-7226
NSN 5925-00-121-5218
NSN 6220-00-316-2500
NSN 6220-01-202-7954
NSN 4140-01-519-9343