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 6130-01-592-3320
NSN 6645-01-648-4439
NSN 6610-01-554-8225
NSN 5945-01-089-9800
NSN 6220-01-381-1793
NSN 6320-00-456-2092
NSN 6110-01-196-0623
NSN 6240-01-408-6394
NSN 5910-01-222-0769
NSN 5990-01-514-8030
NSN 5960-01-388-1988
NSN 6620-01-593-0817