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 5915-01-260-3531
NSN 5990-01-400-3299
NSN 6685-01-333-8621
NSN 6135-01-629-3346
NSN 6110-00-111-2761
NSN 5915-00-406-6460
NSN 6685-01-579-2248
NSN 6220-00-997-3223
NSN 6130-01-011-2586
NSN 6130-01-457-5865
NSN 2925-00-953-2920
NSN 7035-01-325-0536