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 5950-01-469-5974
NSN 5965-01-603-0118
NSN 5998-00-754-7492
NSN 5965-01-151-0903
NSN 5905-01-084-6689
NSN 6105-01-375-9993
NSN 5985-01-014-4924
NSN 5985-01-070-0845
NSN 5855-01-003-0848
NSN 5935-01-262-2632
NSN 6150-01-321-4295
NSN 5910-00-647-4059