BlackStar H120BS12 1 1/2 K2S - 120 Pitch Finished Bore Sprocket - 12 Tooth - 1-1/2" Bore Automotive Is 6/C139 the same as

Is 6/C139 the same as other brands' 6/C139

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It is a direct replacement for Jason Industrial 18/5V1500

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and a 9240 mm (Pitch Length)

BlackStar H120BS12 1 1/2 K2S - 120 Pitch Finished Bore Sprocket - 12 Tooth - 1-1/2" Bore Automotive Is 6/C139 the same asThe BlackStar H120BS12 1 1 2 K2S is a 120 pitch Finished Bore roller chain sprocket with 12 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 1 2" bore with keyway and set screws and is ready for immediate installation. Specifications Part Number H120BS12 1 1 2 K2S Chain Pitch 120 Number of Teeth 12