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 2925-01-363-5978
NSN 6685-00-021-5481
NSN 5895-01-018-4103
NSN 6685-01-371-5445
NSN 6320-01-631-7828
NSN 5996-01-633-7979
NSN 6650-01-447-2858
NSN 6645-01-227-2036
NSN 5920-00-164-4872
NSN 5905-01-315-6967
NSN 7035-00-981-7216
NSN 6650-01-633-9147