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 5835-00-850-1475
NSN 6620-00-209-0767
NSN 6110-01-374-3515
NSN 6240-01-502-7280
NSN 5975-01-502-4465
NSN 2925-01-091-4734
NSN 5895-00-222-8555
NSN 5999-01-383-6754
NSN 5835-01-360-2657
NSN 6320-01-487-0336
NSN 5920-01-445-6547
NSN 5990-00-761-9160