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 6145-01-246-7506
NSN 5920-01-351-5536
NSN 5990-01-573-1634
NSN 6130-00-578-9783
NSN 5965-01-566-2744
NSN 5950-00-286-3301
NSN 5855-01-003-7102
NSN 5905-00-816-9079
NSN 6130-01-012-1037
NSN 6220-01-215-6273
NSN 4140-00-625-1780
NSN 5975-01-305-8185