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 6645-01-465-1318
NSN 5985-01-610-2242
NSN 5950-01-608-1308
NSN 5915-00-133-1339
NSN 5996-01-406-6647
NSN 5910-01-406-3505
NSN 2925-01-501-1104
NSN 6130-01-549-7521
NSN 5905-01-349-8861
NSN 6105-01-443-6732
NSN 6320-01-272-7072
NSN 6645-01-400-2119