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 5855-01-042-7990
NSN 5835-01-100-3265
NSN 5925-01-606-0826
NSN 5999-00-678-0531
NSN 6220-01-229-3722
NSN 5960-01-528-1147
NSN 5920-00-341-6340
NSN 6220-01-242-9901
NSN 5950-00-133-8953
NSN 5985-01-618-2217
NSN 6105-01-565-3557
NSN 6650-01-074-5631