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 5920-00-011-4995
NSN 6220-01-135-3841
NSN 6650-00-061-2232
NSN 2925-01-485-8304
NSN 5895-00-986-1599
NSN 6610-01-291-4173
NSN 6645-01-478-2140
NSN 6110-01-359-9376
NSN 6320-01-449-1014
NSN 5975-00-583-8625
NSN 5895-00-804-9421
NSN 5965-01-461-6071