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 7035-01-413-1021
NSN 5990-01-212-2037
NSN 5855-01-418-6303
NSN 6135-01-151-2705
NSN 6320-00-688-9983
NSN 6320-01-446-6775
NSN 5996-01-407-3777
NSN 5915-01-234-2371
NSN 5996-01-336-1479
NSN 6610-01-034-9044
NSN 5965-00-007-7863
NSN 6645-00-074-4580