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 6220-01-014-7207
NSN 5998-01-224-6642
NSN 7035-01-293-1971
NSN 5975-00-265-0661
NSN 6135-01-623-2970
NSN 5999-01-017-8314
NSN 5985-01-349-9183
NSN 4140-00-731-8037
NSN 5930-01-432-8781
NSN 6610-01-210-2051
NSN 5920-01-130-7636
NSN 6650-01-417-4277