Just Google it. There's plenty of them on-line that you can download for free. You're looking for a *.pat file specifically. Those are what Revit uses to create a its Model and Drafting Patterns.
try this site: CAD Hatch
http://www.cadhatch.com/free-downloads/4588167679
or you can load the pyRevit application:
http://revitaddons.blogspot.com/2019/01/pyrevit-v4610-4611-upcoming-pyrevitlabs.html
Using pyRevit you will be able to customize your pattern very easy..
Constantin Stroescu
Try the attached familiar pattern, upscaled by 10 in HatchKit to directly load into Revit
hth,
Hugh Adamson.
you better import it from a .pat files from Autocad.
it commonly used.
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