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 5990-00-909-8213
NSN 5855-00-237-4088
NSN 6110-00-316-3484
NSN 4140-00-580-8508
NSN 6620-01-431-0706
NSN 5975-01-343-6283
NSN 6610-01-406-4985
NSN 5910-01-250-1438
NSN 5915-01-221-0089
NSN 5920-01-023-0040
NSN 6220-01-537-0985
NSN 6240-00-275-1950