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 5855-01-364-4478
NSN 4140-00-488-6303
NSN 5965-00-289-6280
NSN 5960-00-135-9489
NSN 5920-01-322-4216
NSN 5985-01-044-6027
NSN 5915-00-014-6601
NSN 5855-00-058-1293
NSN 5910-00-202-1056
NSN 4140-00-972-5348
NSN 6150-00-965-8351
NSN 5835-01-392-7683