Info:Martin 10020 3 3/8 Bored-to-Size Roller Chain Sprocket Coupling Hub, #100 Chain, 3-3/8 to 4-5/8 in Dia Bore, 20 Teeth, 8.26 in OD, 6.7188 in Dia Hub, Steel
Info:Martin 10020 3 7/16 Bored-to-Size Roller Chain Sprocket Coupling Hub, #100 Chain, 3-7/16 to 4-5/8 in Dia Bore, 20 Teeth, 8.26 in OD, 6.7188 in Dia Hub, Steel
Info:Martin 10020COV Stock Coupling Cover, For Use With 10020 Coupling, 100 Coupling, 1-1/4 in Chain Pitch, 4.38 in Length Thru Bore, 7/16-14x3/4 in Set Screw, Six-Set Screws, Aluminum
Info:Martin 10020TBF Type TBF Roller Chain Sprocket Coupling Hub, #100 Chain, 4.993 to 4.993 in Dia Bore, 20 Teeth, 8.26 in OD, 6.7188 in Dia Hub, Steel