Proto Nut Driver 4MM X 2-7/8 J9204M-N-SBD

Proto's professional‑grade metric nut driver engineered for precision fastening of 4 mm hex fasteners in industrial, electronic, and mechanical applications. Built with a solid round shank and polished chrome finish, this tool delivers strength and durability expected from Proto’s industrial hand tool lineup. Its ergonomic fluted handle and ASME‑compliant construction ensure comfortable torque control and reliable performance for technicians and maintenance professionals tackling detailed assembly, repair, and service work.
Key Features
• Precision‑formed 4 mm hex tip engineered for accurate fit and secure engagement on metric fasteners
• Solid round shank design enhances strength and resists twisting during use
• Durable polished chrome finish offers corrosion resistance and easy cleanup
• Fluted ergonomic handle provides secure grip and comfortable torque transfer
• Color‑coded handle improves quick size identification in tool kits and workstations
• Built to meet ASME B107.110 professional hand tool standards for industrial reliability
• Ideal for electronics, precision maintenance, assembly, and industrial applications