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 6130-01-324-1834
NSN 5999-01-094-2516
NSN 6645-00-739-6718
NSN 5920-00-134-8499
NSN 5960-01-298-4143
NSN 5950-01-244-4126
NSN 5855-01-364-8193
NSN 5985-01-595-5016
NSN 7035-00-849-5526
NSN 5960-00-151-7576
NSN 5996-01-220-4012
NSN 6685-00-483-2982