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 5905-01-025-6949
NSN 6685-01-502-9028
NSN 5998-01-111-5491
NSN 5998-00-133-9185
NSN 5985-00-186-2236
NSN 4140-00-595-3194
NSN 6620-00-064-3598
NSN 5975-01-054-0119
NSN 6105-01-078-2538
NSN 5975-01-611-2216
NSN 5905-01-599-1720
NSN 5950-01-261-7938