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 6645-01-123-3056
NSN 5930-00-844-0692
NSN 6110-00-361-6510
NSN 6135-01-422-1440
NSN 5999-01-547-3801
NSN 5945-01-616-5889
NSN 6110-00-874-6504
NSN 7035-00-096-9986
NSN 5950-01-049-1359
NSN 5960-01-416-6187
NSN 5935-00-152-2038
NSN 5935-01-151-7428