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 6610-01-553-1317
NSN 5999-01-634-0576
NSN 5960-01-253-5634
NSN 5855-01-448-8159
NSN 4140-01-578-5300
NSN 6220-00-960-5621
NSN 6645-01-599-2311
NSN 5910-01-138-1909
NSN 5855-01-560-9102
NSN 5945-01-203-8019
NSN 5895-00-181-6869
NSN 5999-00-186-9314