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 6620-01-406-6840
NSN 6650-01-555-8819
NSN 6130-00-333-5933
NSN 6105-00-722-6716
NSN 5965-01-167-8513
NSN 5925-00-612-7159
NSN 6145-01-491-9702
NSN 5935-01-348-5122
NSN 5905-00-932-5699
NSN 6320-00-139-1090
NSN 6150-01-389-1978
NSN 6645-01-128-6932