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 5835-01-368-4015
NSN 5930-00-094-6232
NSN 5950-00-617-9502
NSN 5965-01-457-3543
NSN 6110-01-446-0992
NSN 6610-00-814-8598
NSN 6130-01-039-2257
NSN 5985-01-576-8960
NSN 6145-01-373-5377
NSN 6130-00-455-0670
NSN 5895-00-100-4877
NSN 5960-01-505-2426