Check out 3D model for 1 BSW bolts with different length 3D model on CGTrader for $10. High-quality mesh by Chamara-Samarasinghe.
SLDPRT (SolidWorks, filesize: 12.6 MB), STP (STEP, filesize: 1.21 MB), STL (Stereolithography, filesize: 6.69 MB), PDF (PDF, filesize: 477 KB)