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 6145-01-386-6762
NSN 5996-01-600-1632
NSN 6110-00-889-1263
NSN 5975-00-237-4297
NSN 4140-01-400-3610
NSN 5985-01-597-6119
NSN 5965-00-905-6895
NSN 6610-01-461-6182
NSN 5930-00-985-4780
NSN 7035-01-366-5912
NSN 5965-00-170-5254
NSN 6610-00-202-5481