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 5998-01-015-5339
NSN 5925-01-044-5508
NSN 6610-01-033-2402
NSN 6610-00-462-3879
NSN 5950-01-099-9591
NSN 5930-01-142-4655
NSN 5950-01-417-3119
NSN 7035-00-940-2486
NSN 6130-01-596-6988
NSN 6650-01-494-9591
NSN 6240-00-917-1825
NSN 5930-01-500-1326