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 5945-00-401-6481
NSN 6620-00-417-6285
NSN 5935-00-980-3928
NSN 5975-00-267-2776
NSN 6610-01-351-0072
NSN 5855-01-304-3064
NSN 6620-01-648-1594
NSN 5895-00-403-1040
NSN 6650-01-502-6761
NSN 5905-00-964-8812
NSN 6685-00-959-7557
NSN 5935-01-214-2708