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 5990-01-221-6361
NSN 5945-00-680-9634
NSN 6240-01-502-7883
NSN 6220-01-361-8946
NSN 6110-01-442-8080
NSN 6145-01-469-5599
NSN 5855-01-495-1038
NSN 5915-00-809-5254
NSN 2925-00-829-9082
NSN 5835-01-312-4446
NSN 6135-01-359-4293
NSN 5998-01-076-3904