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 5855-00-879-7245
NSN 6220-00-058-5002
NSN 6220-00-893-3558
NSN 5895-01-021-5831
NSN 5985-00-104-8289
NSN 5915-00-078-9574
NSN 5999-01-247-4727
NSN 5945-01-283-2938
NSN 2925-00-284-1534
NSN 6135-01-502-8771
NSN 6135-01-396-4900
NSN 5950-00-152-8197