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 6650-00-155-8431
NSN 6220-01-130-6632
NSN 5895-01-094-5689
NSN 5855-01-634-0259
NSN 4140-00-575-5106
NSN 5910-00-457-4415
NSN 5950-00-623-6814
NSN 5895-01-338-3032
NSN 6620-00-443-7587
NSN 2925-00-263-2714
NSN 6320-00-070-4544
NSN 6130-01-246-9080