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 2925-01-194-9737
NSN 5975-01-540-0980
NSN 2925-00-773-7217
NSN 5930-00-148-5166
NSN 5985-01-312-3084
NSN 6220-01-281-6063
NSN 5996-01-116-1988
NSN 6150-00-754-9911
NSN 5950-00-990-7335
NSN 6610-01-394-4944
NSN 5855-00-939-4496
NSN 5999-01-634-0576