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 5965-01-369-4101
NSN 5905-01-430-2541
NSN 5999-00-144-2303
NSN 5925-01-091-2756
NSN 5935-01-522-7829
NSN 5999-01-136-8144
NSN 6220-01-421-3335
NSN 6685-00-984-6096
NSN 6145-01-139-4859
NSN 5895-00-659-8434
NSN 6610-01-371-5039
NSN 7035-00-834-2090