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 5930-01-519-1291
NSN 5920-01-507-7088
NSN 6240-01-068-3491
NSN 5965-01-518-6227
NSN 7035-01-176-4857
NSN 5905-00-167-6872
NSN 4140-01-631-4447
NSN 6105-00-527-7702
NSN 5895-00-236-3294
NSN 5855-00-879-5849
NSN 6320-01-415-0953
NSN 5915-00-432-9284