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 5985-01-511-5596
NSN 6130-00-913-4809
NSN 6150-01-035-7680
NSN 6110-00-170-6520
NSN 5960-00-181-0640
NSN 5999-01-023-2790
NSN 5915-00-659-3107
NSN 5895-01-160-1682
NSN 5996-01-210-0280
NSN 6320-00-082-5868
NSN 6145-01-601-3258
NSN 6145-01-555-7113