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 5950-00-804-5893
NSN 5930-00-853-5936
NSN 6650-01-365-1894
NSN 4140-00-228-3661
NSN 6105-01-495-8922
NSN 2925-00-468-5273
NSN 5855-01-589-9339
NSN 6105-00-932-0229
NSN 6650-00-561-3762
NSN 6240-00-201-9011
NSN 6645-00-413-0461
NSN 5990-01-584-8363