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 5910-00-008-1668
NSN 5945-00-155-4290
NSN 6220-00-823-6688
NSN 6130-00-299-0395
NSN 5945-00-024-0740
NSN 5895-01-401-5388
NSN 6320-01-466-4175
NSN 5999-01-237-2920
NSN 5915-01-147-0872
NSN 6685-01-420-4575
NSN 5950-01-519-3329
NSN 6610-01-199-7371