BlackStar H50BS20 1 7/16 K2S - 50 Pitch Finished Bore Sprocket - 20 Tooth - 1-7/16" Bore XPA 12/C295 is a standardized industry

12/C295 is a standardized industry size

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The 3/B109 has a 21/32" width

BlackStar H50BS20 1 7/16 K2S - 50 Pitch Finished Bore Sprocket - 20 Tooth - 1-7/16" Bore XPA 12/C295 is a standardized industryThe BlackStar H50BS20 1 7 16 K2S is a 50 pitch Finished Bore roller chain sprocket with 20 teeth, precision manufactured from SAE 1045 steel with induction hardened teeth for extended wear life and features machine cut tooth profiles for smooth, reliable chain engagement. This sprocket has a 1 7 16" bore with keyway and set screws and is ready for immediate installation. Specifications Part Number H50BS20 1 7 16 K2S Chain Pitch 50 Number of Teeth 20