The ARO 7851-E Pneumatic Nut Runner is an inline pneumatic fastening tool from Ingersoll Rand's ARO line, built for repeatable nut‑running on production lines. It provides 48 in‑lbs (5.4 Nm) of torque at a speed of about 4,500 rpm, with an overall length of 9.6 in (244 mm) and a 3/8 in (10 mm) drive. Weighing around 3.2 lb (1.5 kg) and drawing roughly 31 cfm (878 L/min) of air, the 7851-E is designed for fast, controlled seating of nuts on tubing and similar fittings where consistent torque is essential.
