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 7035-00-059-7970
NSN 6320-01-158-0935
NSN 6135-00-100-8890
NSN 4140-01-435-5002
NSN 5905-01-176-5021
NSN 5925-01-185-9897
NSN 5835-01-362-0305
NSN 5920-00-513-2613
NSN 7035-00-513-9764
NSN 5925-01-068-0943
NSN 6145-00-786-1172
NSN 6220-00-447-9656