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 5990-00-067-6791
NSN 6645-00-634-9317
NSN 6610-00-353-5461
NSN 6685-01-423-1464
NSN 5910-01-392-2297
NSN 5895-01-600-0401
NSN 5835-00-612-1621
NSN 6610-00-034-3709
NSN 5925-01-205-2853
NSN 4140-00-738-8604
NSN 6320-00-583-3104
NSN 5960-00-922-7941