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 5935-01-188-1387
NSN 2925-00-056-7112
NSN 4140-01-605-1706
NSN 6645-01-613-7389
NSN 5925-01-346-7103
NSN 6650-01-248-2591
NSN 5965-01-576-9859
NSN 5935-00-868-3572
NSN 5835-00-284-0882
NSN 5996-01-539-5456
NSN 5975-00-856-5246
NSN 5950-00-518-4645