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 5925-01-245-8648
NSN 6320-01-177-3192
NSN 6610-00-567-5984
NSN 6150-01-460-5528
NSN 5990-01-507-7495
NSN 5965-01-271-0808
NSN 5998-01-181-9125
NSN 5930-01-479-2235
NSN 6135-00-100-8890
NSN 5975-00-469-1443
NSN 6135-01-517-6060
NSN 5996-00-041-2107