Cdi 401SM Adjustable Torque Screwdriver 5-40 In/lb

Product Description

The CDI 401SM is an adjustable torque screwdriver designed for precision fastening applications requiring controlled torque output. It delivers a torque range of 5 to 40 inch-pounds with a clockwise limiting direction, making it well-suited for tasks where over-torquing would damage components or fasteners. The 1/4 inch female hex drive accepts standard hex tips, and the tri-lobular handle provides a secure grip during use. Overall length is 6 inches. Accuracy is rated at plus or minus 6 percent, and the tool conforms to ASME B107.300-2010 and N.I.S.T. standards. It is supplied as a single piece and is not tether capable.

The 401SM fits residential and commercial service work wherever low-torque precision fastening is required. Common applications include HVAC control panel assembly, electrical enclosure work, and light mechanical assembly where sensitive fasteners or circuit board hardware must be tightened to a specific torque value without a standard ratchet. The adjustable setting allows the technician to dial in the required torque for each task without swapping tools.

Key Features

• Adjustable torque range: 5 to 40 inch-pounds
• Clockwise limiting direction prevents over-torque
• 1/4 inch female hex drive accepts standard hex tips
• Tri-lobular handle for secure grip and reduced hand fatigue
• Compliant with ASME B107.300-2010 and N.I.S.T. calibration standards
• Plus or minus 6 percent accuracy

Compatibility

Compatible with standard 1/4 inch female hex screwdriver tips. Suitable for any application requiring adjustable clockwise torque in the 5 to 40 inch-pound range.

Installation Notes

This tool is used by HVAC technicians, electricians, and mechanical service professionals for controlled torque fastening. Set the torque value to the fastener specification before beginning work. Power down equipment and de-energize circuits before accessing any fasteners inside electrical or control panels. Follow all applicable NFPA 70 (NEC) lockout/tagout procedures when working inside energized enclosures.