LCN 4050A-18 Drop Plate Instal...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$85.00
$76.46
LCN 4050A-18 Drop Plate for 4050 Series

LCN 4050A-18 Drop Plate Installation Accessory for Hinge Side Mounting

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Model: 4050A-18 689
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$85.00
$76.46
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LCN 4050A Series Drop Plate Installation Accessory for Hinge Side Mounting

Essential Installation Component for 4050 Series Door Closers

The LCN 4050A Series Drop Plate is a specialized installation accessory designed for hinge side mounting applications where the top rail is less than 3-7/8" (98 mm). This essential component requires a minimum 1-3/4" (44 mm) top rail and ensures proper mounting and operation of 4050 Series door closers in challenging architectural configurations. Engineered for commercial applications, this drop plate provides ADA compliant installation solutions for professional door control systems.

Professional Features & Benefits

  • Precise Dimensional Requirements: Designed for top rails less than 3-7/8" (98 mm) with minimum 1-3/4" (44 mm) clearance for optimal hinge side mounting.
  • 4050 Series Compatibility: Specifically engineered for use with LCN 4050 Series door closers for seamless integration and reliable performance.
  • ADA Compliant Design: Meets ADA compliance requirements for accessible door hardware installations in commercial environments.
  • Commercial-Grade Construction: Built to professional standards for demanding commercial door control applications requiring specialized mounting solutions.
  • Hinge Side Mount Solution: Enables proper installation in applications where standard mounting configurations are not feasible due to architectural constraints.
  • Installation Flexibility: Provides mounting options for challenging door frame configurations while maintaining proper closer operation and alignment.

Technical Specifications

  • ADA Compliant: Yes
  • Commercial/Residential: Commercial
  • Department: Door Hardware
  • Parts and Accessories Type: Installation Accessories
  • Product Attribute: Parts and Accessories
  • Product Category: Door Controls
  • Product Group: Door Controls
  • Product Model: 4050A-18
  • Product Subgroup: Parts and Accessories
  • Product Type: Drop Plate
  • Series: 4050A Series
  • Subcategory: Parts and Accessories

Professional Applications

  • Commercial Office Buildings
  • Educational Facilities
  • Healthcare Institutions
  • Retail Establishments
  • Industrial and Warehouse Facilities
  • Multi-Tenant Residential Properties
  • Government and Municipal Buildings

Why Choose LCN Quality?

LCN door control accessories deliver professional-grade reliability with precision-engineered components designed for demanding commercial applications. This drop plate ensures proper installation and ADA compliance in challenging architectural configurations where standard mounting is not feasible. Engineered for demanding commercial applications where dependable performance and code compliance are essential.

Manufacturer Resources

LCN Full Line Catalog

Product Specs

Subcategory:
Parts and Accessories
Series:
4050A Series
Product Group:
Door Controls
Product Subgroup:
Parts and Accessories
Product Type:
Drop Plate
Commercial/Residential:
Commercial
ADA Compliant:
Yes
Parts and Accessories Type:
Installation Accessories
Product Attribute:
Parts and Accessories
Product Model:
4050A-18
Product Category:
Door Controls
Department:
Door Hardware

LCN 4050A-18 689 – Frequently Asked Questions

1) When do I need the LCN 4050A-18 drop plate instead of mounting the closer directly to the door?
You need it when the door's top rail is too narrow to take the closer body on a hinge side (regular arm) mount. The 4050A-18 drop plate is for top rails under 3-7/8 inches (98 mm), and it still needs at least 1-3/4 inches (44 mm) of top rail to land on. If your top rail is 3-7/8 inches or wider, mount the closer straight to the door and skip the plate.
2) Will the 4050A-18 drop plate work with a closer other than an LCN 4050?
No. The 4050A-18 is built for LCN 4050 Series door closers and matches that closer's mounting hole pattern. A drop plate for a different LCN series, or another brand's closer, will not line up. Order the plate that matches the series stamped on the closer body.
3) Is the 4050A-18 drop plate used for hinge side mounting or for parallel arm mounting?
Hinge side only. This plate drops the closer body down on the pull side of the door so a shallow top rail can still accept a regular arm installation. Parallel arm and top jamb setups on narrow rails use different brackets, not this plate.
4) What finishes does the LCN 4050A-18 drop plate come in so it matches the closer on the door?
Six finishes: 689 aluminum, 690 statuary bronze, 691 light bronze, 693 gloss black, 695 dark bronze and 696 brass. Pick the same number as the closer cover so the plate is not a visible mismatch sitting right under it.
5) Does adding a drop plate under an LCN 4050 closer affect ADA compliance on the opening?
The 4050A-18 drop plate is an ADA compliant installation accessory, so relocating the closer body lower on a narrow top rail does not put the mounting outside accessible hardware requirements. The closer's own opening force adjustment is what you set to meet the door's ADA force limit.
6) I manage a portfolio of buildings with aluminum and narrow-rail doors. Is this plate the right fix for closers that won't fit the rail?
If the closers are LCN 4050 Series and the doors have top rails between 1-3/4 and 3-7/8 inches, yes, the 4050A-18 is the standard fix and it is a commercial-duty part, used across offices, schools, healthcare, retail and multi-tenant residential. Measure the rail on each opening first, because rails at or above 3-7/8 inches do not need the plate and rails under 1-3/4 inches cannot use it at all.
7) Is the 4050A-18 a closer or just the mounting plate?
Just the mounting plate. It is an installation accessory, model 4050A-18, and it does not include the door closer, arm or shoe. Order the LCN 4050 Series closer separately and use this plate to mount it.
How fast can I get the LCN 4050A-18 689 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 4050A-18 689 come with a warranty?
Absolutely. The LCN 4050A-18 689 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 4050A-18 689?
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 4050A-18 689 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.
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