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 6135-01-265-1384
NSN 6220-01-238-9194
NSN 6645-01-170-5402
NSN 6150-00-017-4099
NSN 5835-01-091-8353
NSN 5975-01-160-6435
NSN 5999-00-099-6889
NSN 6130-01-478-5227
NSN 5920-00-788-5442
NSN 5835-00-675-5159
NSN 5960-01-057-9186
NSN 4140-00-248-9441