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 5945-01-620-3503
NSN 5905-00-228-6564
NSN 5905-01-453-4607
NSN 6220-01-222-0724
NSN 6685-00-018-1842
NSN 2925-00-192-1166
NSN 5985-01-011-2008
NSN 6645-01-105-4647
NSN 5960-01-649-1341
NSN 5999-01-389-9578
NSN 5920-00-369-0923
NSN 6105-01-492-5723