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 6220-00-992-3799
NSN 5910-01-603-4402
NSN 6135-01-142-2417
NSN 6150-00-415-3969
NSN 6685-00-153-3914
NSN 2925-01-254-3068
NSN 5905-00-042-7818
NSN 5945-01-349-8942
NSN 5895-01-613-9949
NSN 2925-00-483-9357
NSN 6240-01-286-3200
NSN 5950-00-206-3213