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 6650-01-077-7594
NSN 6145-01-415-9593
NSN 6620-01-206-4896
NSN 6685-00-283-6107
NSN 5965-01-332-0622
NSN 5985-01-172-0579
NSN 6650-01-261-5239
NSN 6220-00-573-7385
NSN 5999-01-228-0001
NSN 6650-01-619-9986
NSN 5895-01-223-2405
NSN 5996-00-009-9343