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 5930-01-164-2590
NSN 6610-00-734-5976
NSN 6645-01-056-5291
NSN 5999-01-551-1661
NSN 4140-01-088-5961
NSN 5895-01-519-9373
NSN 5855-01-364-4478
NSN 5925-01-611-1151
NSN 6685-00-342-9408
NSN 5915-00-948-7100
NSN 5855-00-337-3679
NSN 6240-01-528-1585