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 6220-01-600-0257
NSN 6650-00-871-2983
NSN 5935-01-222-1717
NSN 6150-01-296-9801
NSN 6145-00-643-4962
NSN 5950-01-241-1163
NSN 5945-01-614-8936
NSN 6685-01-155-9389
NSN 6620-01-606-2002
NSN 5935-01-369-6112
NSN 5990-01-389-1196
NSN 5910-00-758-4611