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 5996-00-941-7542
NSN 5960-01-598-9072
NSN 5915-01-625-3376
NSN 5999-01-034-2176
NSN 6220-01-141-7709
NSN 5975-01-184-9382
NSN 5915-01-305-8622
NSN 5835-01-024-9249
NSN 5910-00-133-0497
NSN 5895-00-769-5368
NSN 6220-00-177-3086
NSN 2925-01-391-9247