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 5895-01-580-3982
NSN 6320-01-615-6500
NSN 5975-01-420-0404
NSN 5996-01-617-6018
NSN 5895-00-030-0189
NSN 5960-01-560-1958
NSN 5855-01-434-2825
NSN 4140-01-212-3113
NSN 5965-00-680-9749
NSN 5960-01-298-9875
NSN 5990-00-067-6791
NSN 5998-01-060-3836