LCN 4010-3077 Regular Arm Assembly

The LCN 4010-3077 is the standard regular arm assembly for the LCN 4010 Series surface door closure. This is the non-hold-open regular arm that ships standard on every 4010 closer, offered here as a replacement part for when the original arm is damaged, worn, or missing. If your 4010 closer body is in good shape but the arm has failed, this is the exact assembly to bring the closer back to full operation without replacing the entire unit.

What the 4010-3077 Arm Is For

The 4010-3077 is a regular arm, which is the most common and most power-efficient arm configuration for the 4010 Series. It mounts on the hinge (pull) side of the door and controls the door through its closing cycle. This is a Non-Hold-Open (NHO) arm, so it closes the door fully every time and does not hold the door open at any point. If your application needs the door to stay open, that requires a different arm, not this one.

A few things to confirm before ordering. This arm is handed and not field-reversible on some production runs, so match it to your door swing. It is the regular arm specifically, not a parallel arm or a Cush arm, so if your closer is mounted parallel-arm on the push side, you need the corresponding parallel-arm assembly instead. When in doubt, identify how the existing closer is mounted before you order the replacement.

LCN 4010-3077 Specifications

• Type: Regular arm assembly, Non-Hold-Open (NHO).

• Compatibility: For use with the LCN 4010 Series surface-mounted door closer. Also fits the non-sized 4011 within the same series family.

• Function: Standard arm shipped with all 4010 series closers, sold here as a replacement.

• Handing: Handed, not reversible on standard production. Specify right or left swing.

• Finishes: Available in common LCN finishes including aluminum (689) and dark bronze (695), with additional powder-coat and plated options.

• Mounting: Hinge side, regular arm configuration.

About the LCN 4010 Series Closer

Context helps when you are ordering a replacement part. The LCN 4010 is widely regarded as one of the best-performing heavy-duty surface closers built, designed for institutional and high-traffic openings like schools, hospitals, and public buildings. It is UL and cUL listed for self-closing doors with regular or fusible-link arms, and uses sized cylinders rated for interior doors up to 5 feet and exterior doors up to 4 feet. Because the closer is built to last for decades of heavy cycling, replacing a worn arm rather than the whole closer is often the smart, cost-effective repair, which is exactly what this assembly is for.

If you actually need the complete closer rather than the arm, or a different arm type, browse the full closer range rather than ordering this part on its own.

Order the LCN 4010-3077 Regular Arm from American Locksets

American Locksets stocks LCN door closer parts and complete closers from authorized distribution. Find the full closer and other arm types in the LCN door closers section, or browse all door closers for related hardware.