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 5925-00-602-8623
NSN 6150-01-050-5754
NSN 5996-00-311-3041
NSN 5855-01-316-9642
NSN 6610-01-049-8747
NSN 5855-00-256-5562
NSN 7035-01-232-7263
NSN 5965-00-199-4456
NSN 6645-01-633-1852
NSN 5910-01-189-6336
NSN 6610-01-150-7018
NSN 6645-01-568-7517