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 5975-01-357-1564
NSN 5925-01-590-2513
NSN 6620-00-185-1671
NSN 5996-00-177-6267
NSN 5920-00-325-3980
NSN 5965-01-125-5367
NSN 6610-01-419-7130
NSN 5910-01-443-1506
NSN 5910-01-497-3200
NSN 6110-01-503-3707
NSN 5925-01-118-7438
NSN 6130-01-026-0603