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 6220-00-932-3622
NSN 6130-01-452-8059
NSN 6240-01-075-6559
NSN 5998-01-474-6189
NSN 5835-00-622-3334
NSN 5960-01-201-6316
NSN 5915-01-449-5391
NSN 5998-01-525-7685
NSN 5990-01-102-5699
NSN 6130-00-966-1776
NSN 5985-01-100-5599
NSN 6130-00-959-5800