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 6645-01-228-2127
NSN 5975-01-030-0989
NSN 6645-00-736-0476
NSN 5945-00-497-1566
NSN 6150-00-448-2357
NSN 5945-00-824-5849
NSN 5950-00-170-8477
NSN 5920-00-950-9761
NSN 5835-00-145-8926
NSN 6645-01-068-3042
NSN 5950-01-425-5263
NSN 6320-00-139-1090