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 5915-01-552-4661
NSN 5950-01-414-6930
NSN 6240-01-069-2688
NSN 5835-01-373-9506
NSN 5930-00-846-5607
NSN 6610-01-342-5952
NSN 5975-01-658-8225
NSN 5905-01-022-4299
NSN 5935-01-423-1577
NSN 6135-00-377-9165
NSN 5925-00-581-3930
NSN 5950-01-373-1723