BlackStar 35BS45 3/4 K2S - 35 Pitch Finished Bore Sprocket - 45 Tooth - 3/4" Bore 2-Bolt Flange Block What does the P8M in

What does the P8M in 3600-P8M-30 mean

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BlackStar 35BS45 3/4 K2S - 35 Pitch Finished Bore Sprocket - 45 Tooth - 3/4" Bore 2-Bolt Flange Block What does the P8M inThe BlackStar 35BS45 3 4 K2S is a 35 pitch Finished Bore roller chain sprocket with 45 teeth, precision manufactured from SAE 1045 steel and features machine cut tooth profiles for smooth, reliable chain engagement. This sprocket has a 3 4" bore with keyway and set screws and is ready for immediate installation. Specifications Part Number 35BS45 3 4 K2S Chain Pitch 35 Number of Teeth 45 Bore Size 3 4" Minimum Bore 5 8" Maximum Bore 1 1 4" Bore Type