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 7035-01-188-5935
NSN 5998-01-606-4854
NSN 7035-01-271-1643
NSN 5960-00-721-1744
NSN 6135-01-416-3181
NSN 6610-01-129-4967
NSN 5855-00-361-0167
NSN 5925-01-260-7225
NSN 5920-00-168-4483
NSN 5925-00-153-4518
NSN 5975-01-027-2157
NSN 2925-01-027-1293