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 6240-00-964-3728
NSN 5965-01-334-3980
NSN 5855-01-384-4914
NSN 5990-01-354-1366
NSN 6130-00-955-9148
NSN 6135-00-542-6216
NSN 5920-00-228-4498
NSN 5996-00-058-8053
NSN 5996-01-400-0917
NSN 5910-00-500-7599
NSN 5960-01-011-8687
NSN 6320-00-213-0477