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 5935-01-197-0480
NSN 6150-01-104-4323
NSN 6650-01-504-8456
NSN 5998-00-073-7062
NSN 6105-00-146-1568
NSN 6105-00-522-1445
NSN 5925-01-564-3707
NSN 5895-00-420-1384
NSN 5905-01-288-0132
NSN 5915-00-410-7655
NSN 5855-00-472-2055
NSN 6130-01-110-4439