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 6620-01-364-2103
NSN 5915-00-958-6966
NSN 5945-01-089-9800
NSN 5835-01-281-7281
NSN 6135-01-353-1036
NSN 6320-01-160-7757
NSN 4140-01-580-3291
NSN 6145-00-195-1316
NSN 5945-00-282-3181
NSN 5905-00-983-4144
NSN 5998-00-710-8266
NSN 6110-00-596-6644