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 5930-00-282-2736
NSN 5965-01-431-7377
NSN 6240-01-470-2496
NSN 5998-01-018-6381
NSN 5996-01-426-3948
NSN 5960-00-448-0417
NSN 6240-01-245-8996
NSN 5996-00-004-2019
NSN 5996-01-035-8219
NSN 6150-01-463-0162
NSN 2925-00-891-9289
NSN 6240-01-153-2861