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 6240-00-056-0737
NSN 6650-00-520-4253
NSN 5975-01-591-5227
NSN 5835-01-200-7153
NSN 5990-00-554-0366
NSN 5965-00-845-6325
NSN 5990-01-576-4383
NSN 6130-01-643-7201
NSN 6685-01-218-2716
NSN 6220-01-261-6521
NSN 6650-00-238-1199
NSN 4140-01-647-4488