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 5920-00-106-1454
NSN 5998-01-029-4263
NSN 5950-00-027-5037
NSN 6610-01-374-0569
NSN 5930-00-964-7363
NSN 5975-01-458-0842
NSN 6220-01-415-0926
NSN 6685-00-315-9196
NSN 5835-01-553-6772
NSN 5999-00-960-8232
NSN 5915-01-009-2983
NSN 5985-01-491-8961