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 5990-01-416-0362
NSN 5998-00-397-6436
NSN 5895-01-167-1023
NSN 5996-01-570-8294
NSN 5835-01-170-0271
NSN 4140-01-510-9844
NSN 4140-00-920-6393
NSN 5835-01-501-0526
NSN 5975-01-368-1788
NSN 6135-01-056-4609
NSN 5855-01-115-9014
NSN 6135-01-217-3292