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 5950-01-556-1635
NSN 6240-00-107-8192
NSN 5895-00-862-5564
NSN 6650-01-100-3185
NSN 5996-00-498-4416
NSN 6130-01-094-0786
NSN 7035-01-056-4603
NSN 6240-01-418-2606
NSN 5996-00-134-6538
NSN 5835-01-088-4676
NSN 5855-01-529-8717
NSN 5975-01-180-4036