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 5895-01-532-0388
NSN 5999-00-854-6219
NSN 5910-00-571-6357
NSN 5965-00-471-5018
NSN 5905-00-740-3427
NSN 6130-01-487-8699
NSN 6685-01-495-1007
NSN 6105-01-096-1125
NSN 6685-01-055-7384
NSN 6610-01-555-8596
NSN 6240-01-291-4833
NSN 5855-01-389-8884