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 6645-01-067-4393
NSN 5855-01-437-6161
NSN 5950-00-290-8090
NSN 5965-01-438-0647
NSN 6110-01-423-0279
NSN 6610-01-044-1860
NSN 5990-00-419-0236
NSN 5915-01-526-1867
NSN 6135-00-255-1340
NSN 6145-01-053-2969
NSN 5985-01-195-4028
NSN 6645-00-583-0066