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 6620-00-891-8584
NSN 5915-00-107-6828
NSN 5975-01-055-2290
NSN 5925-01-426-6923
NSN 5990-00-230-8981
NSN 5910-01-319-0301
NSN 2925-01-190-0510
NSN 6645-01-390-6520
NSN 5895-01-453-7942
NSN 5930-01-201-4528
NSN 6110-00-995-0133
NSN 5950-00-613-8560