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 5835-01-485-0210
NSN 6220-00-527-1177
NSN 6130-01-644-8582
NSN 6105-00-492-6159
NSN 5925-00-056-0898
NSN 5945-01-371-6305
NSN 5930-01-422-4806
NSN 5905-01-267-4737
NSN 5905-01-218-5936
NSN 6135-00-874-6566
NSN 5930-01-251-9612
NSN 2925-01-429-2235