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 5915-01-622-9544
NSN 5999-00-249-2830
NSN 6110-01-500-0768
NSN 5910-00-440-2200
NSN 2925-01-517-4037
NSN 5920-00-123-5839
NSN 5905-00-287-7791
NSN 6110-01-140-3630
NSN 6645-01-527-5864
NSN 5999-01-010-1082
NSN 5996-01-217-3670
NSN 5975-01-081-4008