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 5855-01-188-4049
NSN 5925-01-363-1365
NSN 6320-01-322-1310
NSN 5990-01-507-1479
NSN 6650-00-930-3372
NSN 6620-01-266-5545
NSN 5990-01-430-3152
NSN 6320-01-441-2438
NSN 5930-00-974-1214
NSN 5920-01-408-9840
NSN 5910-00-368-4108
NSN 5975-00-225-8722