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 6130-00-170-4844
NSN 6135-00-269-5843
NSN 5945-00-138-1469
NSN 5998-00-871-6272
NSN 6150-00-636-0923
NSN 5996-00-730-3971
NSN 5930-01-297-8036
NSN 5930-01-624-6854
NSN 6110-00-139-0750
NSN 5990-01-213-6319
NSN 6620-00-479-9425
NSN 5915-01-183-0081