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 4140-00-891-9245
NSN 5960-01-268-4356
NSN 5945-01-494-7908
NSN 6240-01-288-0555
NSN 5985-01-175-4365
NSN 5975-01-226-5434
NSN 6240-00-153-6519
NSN 5920-01-464-3863
NSN 6110-00-336-1734
NSN 5998-00-082-1641
NSN 2925-01-616-3037
NSN 6645-01-440-5500