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 6620-01-316-4343
NSN 6135-01-369-9792
NSN 6685-00-922-2843
NSN 6650-01-509-8018
NSN 2925-01-400-2286
NSN 5910-01-652-2244
NSN 5945-01-620-0083
NSN 5905-01-590-3028
NSN 6130-00-035-3898
NSN 5998-00-583-5541
NSN 5975-01-645-5729
NSN 7035-01-013-0934