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 5925-01-615-4075
NSN 5920-01-554-9804
NSN 5910-01-024-5066
NSN 6105-01-187-7211
NSN 5895-00-710-4564
NSN 6220-00-823-6688
NSN 6110-01-009-6260
NSN 6620-00-555-3992
NSN 6240-00-578-7422
NSN 5985-01-090-4196
NSN 6650-01-090-0719
NSN 5920-01-010-1080