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 5910-01-534-2027
NSN 6620-00-578-5851
NSN 5855-01-147-4785
NSN 6645-01-352-2221
NSN 6645-01-040-5233
NSN 6130-01-519-9166
NSN 6650-01-431-9625
NSN 5930-01-368-8115
NSN 5996-00-503-8499
NSN 5910-00-360-2334
NSN 5855-00-307-0670
NSN 5998-00-541-6292