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 5945-01-385-8848
NSN 6620-01-507-8444
NSN 5895-01-496-8256
NSN 5999-01-037-6324
NSN 2925-01-424-0235
NSN 6650-00-287-5868
NSN 5999-01-483-5310
NSN 6220-00-106-1149
NSN 5960-00-451-0572
NSN 6110-01-478-2495
NSN 6320-01-607-1491
NSN 5950-01-083-1832