LCN 4003T Heavy Duty Surface-M...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$787.00
$621.50
LCN LCN 4003T Surface-Mounted Heavy Duty Door Closer - Powder Coated Finish LCN-4003T-POWDER

LCN 4003T Heavy Duty Surface-Mounted Door Closer with Powder Coated Finish

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Model: 4003T-STD AL
Selected Finish is

In Stock (leaves warehouse same day if ordered before 3pm ET)

$787.00
$621.50
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LCN 4003T Heavy Duty Surface-Mounted Door Closer with Powder Coated Finish

Professional Fire and Smoke Barrier Door Control Solution

The LCN 4003T Heavy Duty Surface-Mounted Door Closer delivers reliable control for fire and smoke barrier doors with maximum swing of 90°. This UL and cUL listed closer features a cast iron cylinder with 1-1/2" diameter piston and forged steel arm construction, designed for use with SEM 7850 wall magnet systems. Tested and certified under ANSI/BHMA A156.4 Grade 1 standards for demanding commercial applications.

Professional Features & Benefits

  • Heavy-Duty Construction: Cast iron cylinder with full-complement bearing and 1-1/2" diameter piston provides exceptional durability for high-traffic applications.
  • Fire and Smoke Door Control: Specifically designed to control fire and smoke barrier doors with maximum 90° swing for critical safety applications.
  • Grade 1 Performance: Tested and certified under ANSI/BHMA A156.4 Grade 1 standards ensuring reliable operation in commercial environments.
  • All-Weather Reliability: All-weather fluid and forged steel arm construction maintain consistent performance across temperature variations.
  • Universal Installation: Non-handed design with included wood and machine screw pack simplifies installation on various door configurations.
  • SEM 7850 Compatibility: Engineered for use with SEM 7850 wall magnet systems for integrated fire door control solutions.
  • ADA Compliance: Meets ADA requirements for accessible door operation in commercial facilities.
  • Manufacturer Warranty: 30-year warranty provides long-term confidence and protection for commercial installations.

Technical Specifications

  • Refer to manufacturer documentation for complete technical specifications.

Installation & Operation

  1. Review manufacturer specifications and verify door preparation requirements including door thickness, stile width, and handing as applicable to this product.
  2. Use manufacturer-provided templates to mark mounting hole locations accurately on door and/or frame surfaces.
  3. Prepare door and frame by drilling required holes and routing as specified in manufacturer instructions.
  4. Install all mounting hardware and secure the device to door and frame per manufacturer torque specifications.
  5. Adjust operational components for proper alignment, latching, and smooth operation throughout the full range of motion.
  6. Test device operation to verify proper function and make final adjustments as needed. Refer to manufacturer documentation for complete installation details and troubleshooting.

Professional Applications

  • Fire and Smoke Barrier Door Systems
  • Commercial Office Buildings
  • Educational Facilities
  • Healthcare Institutions
  • Industrial and Warehouse Facilities
  • Multi-Tenant Residential Properties
  • Government and Municipal Buildings

Why Choose LCN Quality?

LCN door closer products deliver professional-grade reliability with cast iron cylinder construction and forged steel components rated for Grade 1 performance. The 30-year warranty demonstrates LCN's commitment to long-term durability in demanding commercial applications. Engineered for critical fire and smoke door control where dependable performance is essential for life safety compliance.

Product Documentation & Resources

Product Specs

Series:
4000 Series
Duty Level:
Heavy Duty
ADA Compliant:
Yes
BAA Qualified:
Yes
Warranty:
30 Year
Closer Size:
3
Mounting Detail:
Surface - Hinge (Pull Side)
Mounting Location:
Pull Side
Subcategory:
Door Closers - Surface Mounted
Product Group:
Door Controls
Product Subgroup:
Door Closers - Surface Mounted
Product Type:
Surface Mounted Door Closers
Finish Type:
Powder Coat
Fluid Type:
All-Weather
Commercial/Residential:
Commercial
MAP Policy:
Yes
Product Model:
4003T
Cover Type:
Plastic/Metal
Delay Function:
No
Mounting Method:
Surface Mount
Product Category:
Door Controls
Product Substrate:
Iron
Department:
Door Hardware

LCN 4003T-STD AL – Frequently Asked Questions

1) What door sizes and weights does the LCN 4003T door closer handle?
The LCN 4003T is designed for heavy duty applications on doors up to 4 feet wide and 275 pounds. This makes it suitable for most commercial entrance doors, fire doors, and high-traffic applications where standard closers would fail.
2) Is the LCN 4003T suitable for exterior doors?
Yes, the powder coated finish provides excellent corrosion resistance for exterior applications. The heavy duty construction handles weather exposure and temperature variations that affect door operation.
3) Can this closer be installed on right-hand or left-hand doors?
The LCN 4003T is reversible and works on both right-hand and left-hand doors. The surface mount design allows for standard or top jamb installation depending on your door handing requirements.
4) What finish options are available for the 4003T?
This model features a durable powder coated finish. LCN offers various finish colors in their door closer line. Check the specific model number to confirm the exact finish color for your project.
5) What power rating does the LCN 4003T provide?
The 4003T provides heavy duty closing power suitable for high-traffic commercial applications. It delivers consistent performance on doors with significant weight or wind load resistance.
6) Does this door closer meet fire door requirements?
LCN 4003T closers are commonly used on fire door assemblies. Verify the specific listing requirements for your project with local code officials, as fire door compliance depends on the complete door assembly.
7) What mounting hardware comes with the 4003T?
Standard mounting packages typically include the closer body, arm, brackets, and basic hardware. Heavy duty applications may require additional reinforcement. Check the manufacturer's template for complete hardware specifications.
8) How do you install the LCN 4003T surface mount closer?
Surface mount installation requires mounting the closer body to the door and the bracket to the frame. Follow the manufacturer's drilling template exactly. Heavy duty closers need solid mounting points and may require frame reinforcement.
9) How do you adjust the closing speed on the 4003T?
The LCN 4003T has adjustable closing and latching speeds via adjustment valves. Turn clockwise to slow, counterclockwise to speed up. Make small adjustments and test the door operation between changes.
10) What other LCN models are similar to the 4003T?
The LCN 4000 series includes various heavy duty options. The 4040XP and 4110 series offer similar performance with different features. Browse our door closers section for the complete LCN lineup.
11) How does weather affect the 4003T performance?
Temperature changes affect hydraulic fluid viscosity, which impacts closing speed. The 4003T handles normal temperature variations well. Extreme cold may require seasonal adjustment of closing speed valves.
12) What are the key measurements needed for the 4003T installation?
You need door width, thickness, frame dimensions, and clearance measurements. The closer body requires specific mounting dimensions. Always use the manufacturer's drilling template to ensure proper alignment and operation.
How fast can I get the LCN 4003T-STD AL delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the continental U.S. Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit, reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the LCN 4003T-STD AL come with a warranty?
Absolutely. The LCN 4003T-STD AL is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the LCN 4003T-STD AL?
You can call, text, or email our expert support team for fast answers. We’re here to help with product selection, installation tips, and troubleshooting. Contact Us
Why buy the LCN 4003T-STD AL from ZenSupply?
ZenSupply makes it easy to get the commercial door hardware you need—fast shipping, expert support, and rewards on every order. Our team is always ready to help you choose the right product for your project.

Product Reviews

  • 5
    High Quality Product

    Posted by Jen Magnani on May 13th 2025

    These were a perfect replacement for our existing closure.

!