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 5920-01-514-7007
NSN 5975-01-458-4593
NSN 7035-01-283-2536
NSN 6105-01-401-5361
NSN 5945-01-246-3530
NSN 4140-01-406-2054
NSN 6220-01-369-0681
NSN 4140-00-198-4961
NSN 5950-01-421-4138
NSN 5910-01-065-0977
NSN 5950-01-344-9050
NSN 6645-00-408-3537