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 6240-01-396-2167
NSN 5950-01-566-3459
NSN 5960-01-063-6846
NSN 5975-00-647-4968
NSN 5920-01-132-0178
NSN 6150-01-079-6104
NSN 6240-01-412-4342
NSN 6645-01-535-7136
NSN 5920-00-024-0127
NSN 6145-00-408-1724
NSN 5998-01-486-0547
NSN 6610-01-649-5326