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 5925-01-019-9703
NSN 6130-01-006-3316
NSN 5990-01-400-3299
NSN 5960-00-201-5265
NSN 5920-01-339-1080
NSN 5835-01-332-2867
NSN 6320-00-238-9973
NSN 5996-01-257-0265
NSN 2925-01-458-5808
NSN 6110-01-461-2631
NSN 6150-01-383-4976
NSN 5855-00-631-4565