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 5855-01-010-4921
NSN 6110-00-408-5697
NSN 6645-00-767-6307
NSN 5905-01-610-2018
NSN 5915-00-358-2407
NSN 6320-01-015-9856
NSN 5855-00-688-9954
NSN 5930-00-498-5709
NSN 6650-00-496-8762
NSN 6220-01-042-4613
NSN 5985-00-509-3415
NSN 5960-01-468-6508