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 5998-00-365-2001
NSN 6620-00-619-7769
NSN 5990-01-439-4643
NSN 6110-01-355-9732
NSN 5965-01-631-9848
NSN 5990-01-642-5748
NSN 5935-01-467-9194
NSN 6685-01-560-3479
NSN 5950-01-633-2242
NSN 6320-01-198-4024
NSN 5835-01-207-6612
NSN 5855-01-634-0259