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 5935-01-610-8953
NSN 6610-01-176-9314
NSN 5835-01-442-6482
NSN 6610-01-433-2219
NSN 5930-00-890-4535
NSN 6130-01-229-8896
NSN 5925-01-313-0205
NSN 6220-00-812-0515
NSN 5905-01-460-7525
NSN 5945-01-283-3949
NSN 5910-01-395-0058
NSN 6150-01-208-6478