Atlas Copco QMR42-16-ROT Electric Nutrunner is a straight-drive tightening tool in the QMR family, designed for precise, torque-controlled bolt tightening in assembly work. It is configured with a 3/8-inch drive and a no-load speed around 7,000 rpm, delivering tightening torque up to 50 ft-lb (approximately 68 Nm). In catalog listings, this configuration is associated with part number 4230161390.
