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 6220-01-441-8397
NSN 5999-01-191-3033
NSN 6685-01-495-2013
NSN 6105-01-224-7258
NSN 6650-00-788-1461
NSN 5915-01-025-1362
NSN 5855-01-351-6875
NSN 5935-01-268-8840
NSN 5920-00-529-0618
NSN 5835-01-370-8912
NSN 6220-01-198-6536
NSN 6645-01-268-7265