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 5965-01-277-8589
NSN 6610-00-751-7916
NSN 6220-01-446-1725
NSN 5915-01-271-7299
NSN 5950-01-388-3753
NSN 5999-01-205-0734
NSN 5965-01-251-9480
NSN 6150-00-221-6684
NSN 6110-01-628-6423
NSN 5975-01-125-4411
NSN 5990-00-565-9027
NSN 5835-01-608-3319