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4050A Series Closers

This heavy-duty cast aluminum closer is ideal for commercial building applications and competitive specification situations.


Looking for more information? Connect with an Allegion team member for help.


The 4050A Series cast aluminum closer is engineered for durability, and built tough to excel in the harsh environments of high-frequency and highly abusive traffic areas. Featuring the most common commercial footprint, it is ideal for commercial building applications that demand a combination of quality, reliability and value.

This cast aluminum door closer offers premium features like powder coating, a full-complement bearing, all-weather fluid and a 25-year warranty. With a standard full plastic cover and optional full metal cover, 6 standard colors and unlimited custom colors, the 4050A Series is the right choice for a wide range of heavy-duty applications.


  Heavy Duty

Surface Mounted


Body Construction

  • Cast aluminum cylinder with full-complement bearing
  • 1-1/2” diameter piston
  • Double heat-treated steel pinion journal

Quality and Durability

  • All-weather Liquid X fluid
  • Patent-pending design
  • 25-year warranty


  • Universal non-handed
  • Standard plastic cover
  • Adjustable spring sizes 1-6
  • Meets BAA (Buy American Act)
  • Universal non-handed
  • Adjustable spring sizes 1-6
  • Meets ADA requirements
  • UL and cUL listed
  • Tested and certified under ANSI/BHMA A156.4 Grade 1
  • Standard or optional custom powder coat finish
  • Optional full metal cover
  • Optional SRI primer for installation in corrosive conditions available with powder coat only

The 4050A Series mounts hinge pull side, push side top jamb and push side parallel arm push side. Visit the 4050A Series catalog pages for mounting details, arm options and accessories.

Need Replacement Parts?

Get the resources you need to get in touch with an Allegion team member for LCN replacement parts.


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Did You Know?

Since 1877, LCN has been a leader in delivering safety and security through superior door control and best-in-class customer service. From installation through daily operation, customers can count on LCN.

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As part of Allegion’s family of pioneering brands, LCN benefits from the strength, efficiencies, resources, and integration from a global power. In turn, we pass those advantages on to you.

Allegion helps keep people safe and secure where they live, work and visit. With more than 30 brands sold worldwide, we specialize in security around the doorway and beyond. It’s the power of one.