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 5998-00-437-8172
NSN 5920-00-710-2781
NSN 5998-01-331-7449
NSN 5996-01-480-3431
NSN 5998-00-814-5272
NSN 6610-01-592-3329
NSN 5915-01-260-9248
NSN 5915-01-160-6271
NSN 5915-01-387-5302
NSN 5996-01-521-0367
NSN 5985-01-554-8282
NSN 6220-01-316-9436