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 6105-01-045-1856
NSN 5895-01-236-6120
NSN 6320-00-432-2772
NSN 6620-00-777-3481
NSN 5999-01-595-2918
NSN 5998-00-186-8461
NSN 5960-00-158-4841
NSN 5920-00-225-4758
NSN 5985-00-734-7479
NSN 6220-01-484-9583
NSN 5999-01-573-0595
NSN 5950-01-389-8299