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 6645-00-183-6427
NSN 5975-01-398-9128
NSN 5990-00-990-1711
NSN 5996-01-392-3171
NSN 6130-00-937-9625
NSN 5835-01-631-7390
NSN 5925-01-607-2294
NSN 6220-00-131-6582
NSN 5998-01-519-9273
NSN 5950-01-192-0732
NSN 6645-01-229-9769
NSN 5915-00-089-8063