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 5920-01-541-1643
NSN 6645-00-542-1206
NSN 5915-01-633-9845
NSN 4140-00-699-0904
NSN 5960-00-960-3177
NSN 4140-01-347-3342
NSN 5930-00-931-8001
NSN 6320-01-631-7828
NSN 6320-00-681-1324
NSN 5855-00-548-4742
NSN 5990-01-311-7491
NSN 2925-00-288-1394