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 5990-01-421-3325
NSN 5835-01-244-8532
NSN 5985-00-186-8755
NSN 6610-01-464-3037
NSN 5935-01-634-0668
NSN 5960-01-632-6576
NSN 5950-01-460-5416
NSN 6150-01-238-7518
NSN 5950-01-145-4199
NSN 5910-01-522-5140
NSN 6150-00-088-5699
NSN 6620-00-100-4517