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 5945-01-178-5177
NSN 5935-01-147-8575
NSN 5855-01-424-2287
NSN 5915-00-584-3512
NSN 5910-01-287-9194
NSN 6145-01-650-1791
NSN 6685-00-540-9017
NSN 5998-00-201-7564
NSN 6220-00-149-0977
NSN 5998-01-399-0615
NSN 6135-01-544-8463
NSN 6645-01-133-4440