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 5930-00-475-0287
NSN 6240-01-089-6149
NSN 6150-01-071-8389
NSN 5925-01-489-2791
NSN 6240-00-988-3839
NSN 5855-01-289-0070
NSN 2925-01-459-8093
NSN 5910-01-536-0009
NSN 5935-01-406-5604
NSN 5975-01-243-1108
NSN 5950-01-444-7992
NSN 5950-01-295-6608