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 5905-01-065-8711
NSN 5835-01-116-2369
NSN 5999-01-535-0606
NSN 5930-01-515-7307
NSN 6645-01-056-5291
NSN 5905-01-448-4308
NSN 2925-00-502-3768
NSN 5925-01-634-0664
NSN 5930-00-401-7781
NSN 6145-01-351-6342
NSN 6110-00-181-3382
NSN 5920-01-434-5701