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 6135-01-142-2417
NSN 6685-01-441-9628
NSN 5999-01-261-4452
NSN 5910-00-339-2198
NSN 6685-00-313-9239
NSN 6220-00-635-4424
NSN 6220-01-512-2028
NSN 5990-01-416-0362
NSN 5835-00-453-9752
NSN 5935-00-751-9668
NSN 6150-01-515-2296
NSN 5945-01-371-2556