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 5905-00-420-8533
NSN 6135-01-440-9412
NSN 5998-01-055-7678
NSN 5999-01-348-5717
NSN 5999-01-040-8325
NSN 6685-01-391-7375
NSN 5925-01-391-4986
NSN 5915-00-998-4573
NSN 2925-00-386-8745
NSN 5915-00-851-7862
NSN 6130-01-541-5334
NSN 6135-00-170-8819