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 6685-01-421-5743
NSN 5950-01-043-4207
NSN 5920-00-410-2338
NSN 5999-01-512-6710
NSN 6610-00-139-1105
NSN 6135-00-422-3967
NSN 5915-01-390-5482
NSN 5999-01-310-7839
NSN 5996-00-221-5897
NSN 6130-01-611-5025
NSN 6105-00-719-9943
NSN 6610-00-925-3914