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 6130-00-994-5110
NSN 6220-00-607-5961
NSN 6150-00-196-0696
NSN 6650-01-577-1784
NSN 5905-01-288-6240
NSN 5915-01-049-6615
NSN 5945-00-473-3369
NSN 5998-01-208-9056
NSN 6145-01-167-1835
NSN 5996-01-619-0589
NSN 6685-01-393-9819
NSN 5985-01-474-1345