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 5910-00-325-7717
NSN 6135-00-898-6996
NSN 6645-00-108-6479
NSN 6145-01-055-8851
NSN 5905-01-426-3663
NSN 5965-00-222-0282
NSN 6320-01-292-6635
NSN 5960-01-073-4201
NSN 4140-00-751-1694
NSN 6620-00-246-1529
NSN 6650-01-577-4447
NSN 5835-01-209-6410