Name: LCN 4050A-3077SCNS Spring Cush-N-Stop Arm with Forged Steel Construction
Brand: LCN
SKU: 4050A-3077SCNS 689
Price: 285.75 USD
Availability: InStock

Product Overview
FAQs

LCN 4050A Series Spring Cush-N-Stop Arm with Forged Steel Construction

Heavy-Duty Door Closer Replacement Arm

The LCN 4050A Series Spring Cush-N-Stop Arm delivers professional-grade durability for demanding commercial applications. This non-handed replacement arm features solid forged steel main arm and forearm construction with spring-loaded stop in the soffit shoe, specifically engineered for potentially abusive applications where standard arms may fail.

Professional Features & Benefits

Heavy-Duty Construction: Solid forged steel main arm and forearm provide exceptional durability for high-traffic and potentially abusive applications.
Spring-Loaded Stop Design: Integrated spring-loaded stop in the soffit shoe absorbs impact and reduces stress on door closer mechanisms.
Non-Handed Configuration: Universal design eliminates the need for separate left and right-hand versions, simplifying inventory and installation.
4050A Series Compatibility: Designed specifically for LCN 4050A Series door closers for precise fit and optimal performance.
ADA Compliant Design: Meets ADA requirements for commercial door control applications.
Abuse-Resistant Engineering: Purpose-built for environments where door hardware experiences heavy use or potential vandalism.

Technical Specifications

ADA Compliant: Yes
Commercial/Residential: Commercial
Department: Door Hardware
Parts and Accessories Type: Replacement Parts
Product Attribute: Parts and Accessories
Product Category: Door Controls
Product Group: Door Controls
Product Model: 4050A-3077SCNS
Product Subgroup: Parts and Accessories
Product Type: Arm
Series: 4050A Series
Subcategory: Parts and Accessories

Professional Applications

High-Traffic Commercial Buildings
Educational Facilities with Heavy Use
Healthcare Institution Entry Points
Retail Establishments
Industrial and Warehouse Facilities
Government and Municipal Buildings
Multi-Tenant Residential Properties

Why Choose LCN Quality?

LCN door closer components deliver professional-grade reliability with solid forged steel construction engineered for demanding commercial applications. The Spring Cush-N-Stop design provides enhanced durability in potentially abusive environments where dependable performance is essential. ADA compliant design ensures code compliance for commercial installations.

Manufacturer Resources

LCN Full Line Catalog

Product Specs

Series:: 4050A Series
Subcategory:: Parts and Accessories
Product Group:: Door Controls
Product Subgroup:: Parts and Accessories
Product Type:: Door Closer Arms
Commercial/Residential:: Commercial
ADA Compliant:: Yes
Parts and Accessories Type:: Replacement Parts
Product Attribute:: Parts and Accessories
Product Model:: 4050A-3077SCNS
Product Category:: Door Controls
Department:: Door Hardware

LCN 4050A-3077SCNS 689 – Frequently Asked Questions

1) Do I need to order a left-hand or right-hand version of the LCN 4050A Spring Cush-N-Stop arm?

Neither. The 4050A-3077SCNS arm is non-handed, so one part covers both left and right hand doors. That is useful if you are stocking spares for a building with openings swinging both ways, since you carry one line item instead of two.

2) Will this LCN arm fit a closer other than the 4050A?

It is built for LCN 4050A Series closers. The arm, forearm and soffit shoe geometry are matched to that body, so treat it as a 4050A part and confirm the closer stamped on your existing unit before ordering.

3) What does the Spring Cush-N-Stop arm actually do differently from a plain parallel arm?

The stop is built into the soffit shoe and it is spring loaded, so when the door is thrown open the spring takes the hit instead of the closer body and the door. A plain arm has no stop at all and you would need a separate floor or wall stop. A dead stop arm has a rigid stop with no cushion. Spring cush is what you put on doors that get slammed, like a school corridor or a loading area.

4) Can I replace just the arm instead of the whole door closer?

That is exactly what this part is for. The 4050A-3077SCNS is catalogued as a replacement part, so if the closer body still holds oil and controls the sweep but the arm is bent, sheared or the stop is gone, you rebuild the opening with the arm only.

5) What are my options if the closer on the door is not an LCN 4050A?

Arms are closer specific, so match the brand and series. For Sargent 351 or 281 closers, the 25-CPS parallel arm with compression stop is the equivalent non hold-open choice and the 25-CPSH is the hold-open version with compression stop. On Falcon, the SC60A-3049DS is a hold-open dead stop parallel arm for SC60A closers and the SC70A-3049/PA is the hold-open arm with PA bracket for SC70A closers.

6) Does this LCN arm hold the door open?

No. The 4050A Spring Cush-N-Stop arm stops the swing and cushions it, but there is no hold-open detent. If the opening needs to stand open for deliveries or cleaning, look at a hold-open arm instead, on Sargent 351 and 281 closers that is the 25-H for regular and top jamb mount or the 25-CPSH if you also want the compression stop.

7) What is the closest equivalent to the LCN 4050A-3077SCNS spring stop arm from another manufacturer?

The LCN 4050A-3077SCNS is a spring Cush-N-Stop arm, meaning the stop is built into the soffit shoe on a parallel arm assembly. The nearest peers are the Sargent 25-CPS heavy duty parallel arm door closer with compression stop, which is listed as compatible with Sargent 351 and 281 closers, and the Sargent 1431-CPS TB EN heavy duty surface closer with parallel arm and compression stop. Both are Grade 1 heavy duty. The key difference is that the Sargent 25-CPS and 1431-CPS TB EN are sold as closer assemblies tied to Sargent bodies, while the 4050A-3077SCNS is a replacement arm intended for LCN 4050A Series closers. Closer arms are not interchangeable across manufacturers, so an LCN 4050A body needs the LCN arm.

8) I need the door to stay open as well as stop. Is there an arm that does both?

The LCN 4050A-3077SCNS provides a spring-loaded stop in the soffit shoe but is a stop arm, not a hold-open arm. If the opening needs hold-open, the Sargent 25-CPSH is a heavy-duty hold-open parallel arm with compression stop for Sargent 351 and 281 closers, and the Falcon SC60A-3049DS is a hold-open dead stop parallel arm assembly for SC60A Series closers. Each is matched to its own closer family, so pick the one that corresponds to the closer body already on the door.

9) Will a Falcon 8230-3077PLCM arm work in place of the LCN 4050A-3077SCNS?

No, despite the similar 3077 number in the part code. The Falcon 8230-3077PLCM is a standard arm with track for Falcon 8230 Series automatic door operators, so it is a track arm for a powered operator. The LCN 4050A-3077SCNS is a non-handed forged steel spring Cush-N-Stop arm for LCN 4050A Series manual surface closers. Different mounting geometry and different closer family, so they are not substitutes for one another.

10) Is a forged steel closer arm worth it over a standard arm on a high abuse door?

On doors that get abused, yes. Both the main arm and forearm on the 4050A-3077SCNS are solid forged steel rather than cast, which is the part that usually gives way first when a door gets kicked open into a stop. It is specified for commercial use, not residential.

11) What finishes does the LCN 4050A Spring Cush-N-Stop arm come in?

Six: 689 aluminum, 690 statuary bronze, 691 light bronze, 693 gloss black, 695 dark bronze and 696 brass. Match the number to the closer cover you already have on the opening so the arm does not read as a mismatched repair, 689 and 695 are the two you will see most on commercial buildings.

12) Will swapping to this arm keep my door ADA compliant?

The 4050A Spring Cush-N-Stop arm is an ADA compliant design for commercial door control. Bear in mind the arm alone does not set opening force, that comes from how the closer body is sized and adjusted, so re-check the door after the swap.

13) We manage a school with heavy corridor traffic. Is this the right arm to standardize on?

For LCN 4050A closers in schools, healthcare entries, retail and municipal buildings, the Spring Cush-N-Stop is the arm built for that duty, it is made for potentially abusive applications where a standard arm fails. Being non-handed, one part number covers every opening in the building regardless of swing, and you pick a single finish to keep the fleet consistent.

14) The door has a separate wall stop already. Do I still need a Cush-N-Stop arm?

No. The 4050A-3077SCNS spring Cush-N-Stop arm exists to absorb the stop impact at the arm for abusive applications. Where a wall or floor stop already controls the swing, a plain hold-open or regular arm is the simpler choice: the Sargent 25-H is a hold-open arm for 351 and 281 closers in standard and top jamb mount, and the Falcon SC70A-3049/PA is a hold-open arm supplied with a PA bracket for SC70A Series closers. Match the arm to the closer brand and series on the door.

15) What do I use for a center hung door instead of the 4050A-3077SCNS?

The LCN 4050A-3077SCNS is a surface closer arm for LCN 4050A Series closers and assumes a conventionally hung door with a soffit or parallel arm application. For a center hung opening, the Falcon OHC100A-DP is a center hung floor pivot with end load arm for Falcon OHC100 Series overhead concealed closers, which is the correct family for that hanging condition.

16) I am replacing a whole closer, not just the arm. What should I look at?

The LCN 4050A-3077SCNS is a replacement part, an arm only, so it suits jobs where the closer body is sound and the arm is damaged. If the body is being replaced too, complete units include the Sargent 25-CPS and the Sargent 1431-CPS TB EN, both Grade 1 heavy duty surface closers supplied with a parallel arm and compression stop.

17) Is a closer arm with a built-in stop a replacement for a wall or floor stop?

On the 4050A it takes over the job, the stop is integral to the soffit shoe and it is sprung so it absorbs the impact rather than transmitting it into the closer. That matters where a wall stop cannot be mounted, glass sidelites, a return wall out of reach, or a door that opens into open floor. It does not replace an overhead holder if you need the door parked open.

How fast can I get the LCN 4050A-3077SCNS 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-3077SCNS 689 come with a warranty?

Absolutely. The LCN 4050A-3077SCNS 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-3077SCNS 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-3077SCNS 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.

LCN 4050A-3077SCNS Spring Cush-N-Stop Arm with Forged Steel Construction

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