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 6685-00-813-9653
NSN 5935-00-686-5909
NSN 5905-01-047-6222
NSN 4140-00-137-2493
NSN 5895-00-615-6503
NSN 6135-00-299-6918
NSN 5950-01-611-5858
NSN 5930-00-685-0588
NSN 5910-01-422-1699
NSN 5975-00-854-2657
NSN 5975-01-442-3120
NSN 5990-00-127-2306