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 5895-01-481-3015
NSN 5930-01-089-4041
NSN 5945-01-206-5411
NSN 7035-00-142-9076
NSN 4140-01-584-5706
NSN 6110-01-400-4207
NSN 6145-01-608-7478
NSN 5915-00-075-1086
NSN 6685-00-527-7952
NSN 6320-00-004-9158
NSN 5905-01-388-2939
NSN 6685-01-640-8979