Atlas Copco 4230 1901 80 QXT 38-020 QMX42-2RT Nutrunner

Atlas Copco QMX42-2RT Electric Nutrunner is an inline tightening tool designed for precise, repeatable assembly of 3/8-inch fasteners. Cataloged as 4230 1901 80 QXT 38-020 with a QMX42 front assembly, it features a 6-5/8-inch output shaft and a 3/8-inch socket drive interface, enabling compatibility with standard 3/8" sockets. The unit weighs approximately 10 lb (about 4.5 kg), and the front part integrates with a QM.42 socket holder configuration to support reliable tool-to-fastener engagement. The QMX42-2RT lineup uses Atlas Copco’s brushless DC motor, delivering consistent performance and reduced maintenance over time. This nutrunner is positioned for inline tightening tasks in manual or semi-automatic workflows where a compact, robust electric tool is preferred for small-to-medium fasteners. Its drive size and shaft length support reach and access in constrained assembly environments, while the 38-020 designation reflects the drive/configuration combination used for this model. In practice, it serves as a dependable option for controlled torque applications requiring repeatable results without the variability of manual tightening.