Plastics Design Reference

Design Guides

  • Plastic Joining Guide by Covestro PDF (1.6 MB)
  • Part and Mold Design Guide by Covestro PDF (4.1 MB)
  • Designing with Plastics by Gunter Erhard PDF (765.8 KB)
  • Snap-Fit Design Manual by BASF PDF (1003.5 KB)
  • Snap-Fit Joints for Plastics by Bayer PDF (2.5 MB)


:warning: CAUTION: Use threaded inserts as nuts.
This ensures positive retention when torqued, especially for small inserts.

:warning: CAUTION: Never leave an air gap between threaded insert and mating face.
Unless you absolutely must, and have tight control of installation torque, flush installations are recommended to avoid pullout.