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 6145-01-523-0980
NSN 5920-00-552-9145
NSN 5996-00-900-5251
NSN 6220-01-319-1166
NSN 5925-00-738-7301
NSN 6135-01-324-7718
NSN 6150-00-062-6587
NSN 5925-01-224-1758
NSN 6320-00-894-1644
NSN 5835-01-442-6079
NSN 6685-00-218-1229
NSN 6620-01-187-7267