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 6220-00-900-7595
NSN 5990-00-296-4825
NSN 5920-00-259-7294
NSN 6105-00-401-4195
NSN 5945-01-141-5570
NSN 6130-01-415-1423
NSN 5930-01-432-0569
NSN 6685-01-144-4384
NSN 5945-01-254-5906
NSN 4140-00-707-5963
NSN 6135-01-452-8999
NSN 5915-01-349-8437