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 5855-01-337-9488
NSN 6685-01-243-0372
NSN 5930-01-579-6163
NSN 6650-00-929-3946
NSN 5905-00-621-1797
NSN 5975-00-445-1396
NSN 6320-00-422-9006
NSN 6240-00-883-8484
NSN 7035-01-630-3552
NSN 6685-00-269-6444
NSN 4140-00-937-0016
NSN 5965-00-051-6434