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 5895-01-394-8428
NSN 5835-01-290-4397
NSN 5925-00-226-0377
NSN 5915-01-136-2747
NSN 6645-01-439-8368
NSN 5999-00-518-1007
NSN 5835-01-651-6652
NSN 6220-01-055-7423
NSN 5915-00-888-4379
NSN 2925-01-359-4027
NSN 5996-01-483-7845
NSN 5905-01-470-2701