All crank pins have 0.

062 in deep heat-treated penetration #49-6034 and 49-6036 have 3 oil holes for increased lubrication Note - Late style nuts with 1 in-20 threads, #49-1804, must be used on Late 81-99 Big Twin crank pin.

This product can be used with Model Part # Harley-Davidson K H-D#23960-54 54-Early 81 CPHD-1 Harley-Davidson Sportster H-D#23960-54 54-Early 81 CPHD-1 Harley-Davidson Big Twin H-D#23961-41 41-Early 81 CPHD-2 Harley-Davidson Big Twin H-D#23961-80A Late 81-99 CPHD-3