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 5950-01-114-6590
NSN 5985-00-863-0450
NSN 6130-01-639-8149
NSN 6110-00-713-5594
NSN 5935-00-994-5172
NSN 2925-00-964-7128
NSN 4140-01-223-4079
NSN 6150-01-509-9934
NSN 6650-00-177-0983
NSN 5950-00-753-0955
NSN 2925-01-197-7864
NSN 6685-00-562-2047