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 5910-01-509-0292
NSN 6220-00-635-8818
NSN 5945-01-384-3735
NSN 6320-00-593-0379
NSN 5996-00-301-0215
NSN 5855-01-653-1591
NSN 6135-01-142-2417
NSN 5965-00-553-3505
NSN 5835-01-531-0379
NSN 5930-01-202-7926
NSN 5998-00-707-5781
NSN 5950-00-337-3871