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 5910-01-401-5279
NSN 5930-00-156-6684
NSN 5920-01-216-1981
NSN 6610-00-416-9830
NSN 6145-01-033-1492
NSN 5965-00-705-1690
NSN 6110-00-344-9432
NSN 6110-01-641-3957
NSN 5999-01-021-9626
NSN 5905-01-054-3393
NSN 5960-00-137-7692
NSN 5985-00-419-0342