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 5998-01-005-0310
NSN 6645-01-319-8203
NSN 5930-01-085-5563
NSN 2925-01-144-7106
NSN 5999-01-431-4195
NSN 6110-01-500-0768
NSN 6145-01-491-7530
NSN 5905-01-455-7159
NSN 5999-00-650-8657
NSN 6620-00-290-6505
NSN 5930-01-423-0874
NSN 5990-00-583-9920