Clutch Drum Chain Sprocket For UC3000A UC3001A UC3030A UC3530A UC3530AP UC3051A UC3551A UC4011A UC4020A UC4030A UC4030AP Material: grade steel Part Numbers: 123886-6, 125331-7 Design: Heavy-duty Clutch Drum Sprocket Compatibility: UC3000A, UC3001A, UC3030A, UC3530A, UC3530AP, UC3051A, UC3551A, UC4011A, UC4020A, UC4030A, UC4030AP, UC4051A, UC4530A, UC4551A Dimensions: Spur Pitch: 3/8, Splines: 6Z, Total Height: 36mm, Hole ID: 8Φ, Drum ID: 69.8Φ This clutch drum sprocket is constructed from grade steel for performance in electric chainsaws.It features a 3/8 spur pitch and 6Z splines to support consistent power transmission and efficient cutting.The heavy-duty design supports durability under regular use in gardening and landscaping tasks.Designed as a direct replacement, this sprocket fits multiple electric chainsaw models including UC3000A, UC3001A, UC3030A, UC3530A, UC3530AP, UC3051A, UC3551A, UC4011A, UC4020A, UC4030A, and UC4030AP.Installation is straightforward, allowing for quick replacement of worn components.The sprocket is engineered to maintain structural integrity under operating temperatures, with low volatile material emissions up to 105℃.This stable performance during extended use.Suitable for both professional and residential applications, it provides dependable function for chainsaw maintenance and.This is an aftermarket spare.Brand and model mentions do not imply manufacturer association.