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 6105-01-380-9588
NSN 4140-01-420-7269
NSN 6685-01-034-2277
NSN 5930-00-964-5298
NSN 6130-00-009-6193
NSN 5895-01-426-7937
NSN 5930-00-284-4181
NSN 6610-01-452-9486
NSN 5950-01-620-9003
NSN 6320-01-466-4175
NSN 5998-01-316-1220
NSN 2925-01-518-3453