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 5835-00-980-0468
NSN 6320-01-330-2138
NSN 5835-00-170-5238
NSN 5998-01-166-6128
NSN 4140-01-494-2779
NSN 5935-00-353-3293
NSN 5920-01-373-4629
NSN 6135-01-313-8323
NSN 2925-01-629-7757
NSN 6110-00-093-2539
NSN 6645-01-083-4759
NSN 6135-01-562-3056