The rosette cam nut is made from brass and knurled for a good hand grip.

Download:   knurlednut1.pdf is 31k PDF file that can be viewed and printed with Acrobat reader.

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Only limited details are available and the projects have NOT been engineered by the authors. Therefore, when you use the ideas for projects of your own, not for commercial use, you must develop your own details and plans and the safety and performance of your work is your responsibility.
Be safe,

Fred Connell & Roland Hege