Welcome to SW forums Seth
I would suggest to do a quick video drive update. Is it a file specific issue? Also share your SW version and SP, OS and other system details?
Also read this post for your future reference: Forum Posting
Thanks! The video driver is up-to-date, and I have seen this issue occur for years on countless files. I'm using SolidWorks 2009, SP5.0 on a Windows XP Profession x64. I've tried Googling this issue, but either my search terms are not limited enough, or this is not a common problem.
I haven't had this issue, so few things to do is:
1 Search in SolidWorks knowledge base (for similar issues and remedies)
2 Report it to your VAR (the person/company from which you have bought the software).
3 Share one file here with drawing to test/check.
Try using Insert Model Items and selecting cosmetic thread.
See if that is what you are looking for.