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 5990-01-434-7913
NSN 5930-01-142-2214
NSN 5925-01-317-6721
NSN 5975-00-073-9090
NSN 2925-01-273-4898
NSN 5910-01-207-2293
NSN 6135-01-596-3145
NSN 5999-01-171-3538
NSN 6610-01-510-8687
NSN 6150-00-056-6035
NSN 5935-01-273-4023
NSN 6135-01-226-4071