Product Description
LCN 4031 with Light Duty Parallel Arm in Dark Bronze
When heavy-duty isn't enough — the LCN 4031 is the extra heavy-duty closer for oversized doors, exterior entries with wind load, and high-abuse locations where standard closers fail within months. Ships in Dark Bronze finish — matches oil-rubbed and dark bronze architectural hardware.
Pro-Tip from Our Locksmiths: The 4031 is built for doors that eat regular closers for breakfast. Exterior stairwell doors, parking garage entries, loading docks — any door that gets slammed, propped, and abused. If you're replacing closers on the same door more than once a year, step up to the 4031.
| Brand | LCN (Allegion) |
| Part Number | 4031-LD/PA-DKBRZ |
| Series | LCN 4031 |
| Arm Type | Light Duty Parallel Arm |
| Finish | Dark Bronze |
| Grade / Duty | Heavy Duty |
| Mount Type | Surface |
| Fire Rating | Non Fire Rated |
| UL Listed | Yes — UL Listed for fire-rated door assemblies |
| Spring Power | Size 1-6 |
| Warranty | 3 years limited manufacturer's warranty |
- Extra heavy-duty hydraulic mechanism for high-abuse doors
- Handles wide doors up to 60" and heavy doors with wind load
- Full adjustable closing speed, latch, and backcheck
- Cast iron body withstands institutional abuse
Works With: Updated version of the LCN 4030. For replacement parts, arms, and covers, search LCN 4031 on our site.
Ships Same Day — Order before 2PM EST and your LCN product ships the same business day. Lock Depot is an authorized LCN distributor — every product includes the full manufacturer warranty. Need help? Call (877) 365-5625.
Image shown is representative of the product line. Actual finish, trim, and configuration may vary by SKU.
Warranty Information
Limited lifetime warranty on closer bodyProduct Videos
Custom Field
Product Type Door Closer
Function Heavy Duty
Series 4031
Finish Dark Bronze
Trim Light Duty Parallel Arm
Mount Type Surface
Monitoring Non-Handed
Mode Single Door
Fire Rated Non Fire Rated
seclock 4031-LD/PA 695
