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 5999-01-051-3390
NSN 6130-01-215-2397
NSN 6650-00-369-4429
NSN 6110-00-427-4454
NSN 6650-01-056-4632
NSN 4140-00-936-0233
NSN 6685-01-159-2687
NSN 6685-00-677-3925
NSN 5920-01-050-7474
NSN 5998-01-224-5101
NSN 6685-01-577-9681
NSN 6145-01-633-4679