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 6135-00-477-8847
NSN 6320-00-468-8421
NSN 5990-00-984-3661
NSN 5998-00-156-4934
NSN 7035-01-060-1227
NSN 6685-01-372-8769
NSN 6620-01-476-7355
NSN 4140-01-322-7080
NSN 5975-00-380-5753
NSN 6145-00-107-7913
NSN 6650-01-422-1037
NSN 2925-01-359-9818