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 6650-01-160-5058
NSN 5950-00-089-4384
NSN 6105-01-023-6338
NSN 5996-01-015-6460
NSN 5998-01-278-9364
NSN 6150-00-221-5122
NSN 5975-00-611-8567
NSN 6150-01-353-5732
NSN 5930-00-703-4464
NSN 6130-01-154-2234
NSN 6220-01-142-3148
NSN 5996-01-444-4547