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 6220-01-378-2556
NSN 5990-01-400-3299
NSN 4140-00-882-2233
NSN 5920-01-326-4247
NSN 5975-01-386-5118
NSN 2925-01-567-8027
NSN 6650-01-435-2671
NSN 6645-01-343-1676
NSN 7035-01-227-2546
NSN 5895-01-492-6233
NSN 5950-00-823-1229
NSN 5835-01-459-7428