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 5998-01-203-8320
NSN 5905-01-113-6821
NSN 5855-00-198-3197
NSN 5999-01-513-8635
NSN 5915-00-851-1208
NSN 5855-00-688-9954
NSN 6130-01-065-6071
NSN 2925-00-215-4954
NSN 5996-01-018-1635
NSN 5960-01-102-2438
NSN 2925-01-625-6841
NSN 5998-01-247-9593