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 5935-01-592-6870
NSN 6650-01-181-6037
NSN 5835-01-442-6482
NSN 5990-00-738-4909
NSN 5985-01-179-1830
NSN 6685-01-229-7048
NSN 5950-00-161-3044
NSN 4140-01-573-8264
NSN 6130-00-471-5067
NSN 5945-00-627-3699
NSN 4140-01-326-2347
NSN 6135-00-274-4037