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 6620-01-467-2111
NSN 5985-00-127-8669
NSN 6145-01-098-7100
NSN 6105-01-277-0295
NSN 6650-01-147-0288
NSN 4140-01-307-3143
NSN 5998-01-152-2248
NSN 6240-01-240-7529
NSN 5998-00-468-7998
NSN 4140-01-069-1466
NSN 5999-00-946-2504
NSN 6105-01-150-1462