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 6110-01-157-2520
NSN 6135-01-372-6985
NSN 5945-01-462-1555
NSN 5960-01-303-0301
NSN 6645-01-479-0804
NSN 5990-01-598-8769
NSN 5945-00-679-3956
NSN 5945-01-519-8887
NSN 5905-00-303-8157
NSN 5985-01-206-7511
NSN 6610-01-642-0258
NSN 6130-01-027-7356