Fusible Link

Shop online to get your LCN fusible links, closers and arms shipped to your door. We have plenty of these items available to be conveniently purchased from our online store today. 

About LCN Fusible Links

LCN is a door closer and accessories manufacturer that has been delivering quality products since 1926. We offer a full range of products from the LCN fusible link line here at RBADoor.com. The closers in this line can be used on fire rated doors.   

Before purchasing an LCN fusible link or door closer from us, you will want to know a little about the product itself. The LCN fusible link is designed to melt when it reaches a temperature of 135 degrees. When the link melts, it releases the hold open mechanism and the door closes to contain the heat source.  

The fusible link door closers were used from the 1940's to now, but have seen their usage declining due to the modern fire alarm systems that are wired into door closers. At this point, LCN is one of the only companies still making this type of door closer. 

Since 1970, our company Robert Brooke & Associates has prided itself on offering the best in door closers plus all associated parts and accessories. We continue to sell high-quality, well-built products such as LCN fusible links, closers and arms at RBADoor.com.

Shop Our Supply Of LCN Fusible Links 

We carry the LCN Fusible Link 165 Degrees which will release the hold open mechanism on the door closer when it melts at a 165 degree temperature. This link is a half inch wide and 1-⅜ inches long. See the product photo we have provided for the LCN fusible link in order to get a visual of the part.

The LCN fusible link closers that can be used with this item are the 4010-FL, 4110-FL and the 4020-FL. The next section describes these LCN fusible link closers in more detail.

LCN Fusible Link Closers

The first on our list of LCN fusible link closers is the LCN Door Closer 4010 FL. With this closer, you can select the color and hand you prefer. You can choose aluminum or dark bronze for the color in left or right handed styles.

The 4010 FL Closer should be mounted on the hinge side of a door that is either right or left handed. These closers are shipped out to our customers with a few parts including the link arm, screws and the standard plastic cover. 

The LCN fusible link arm that is included with the 4010 FL Closer has a link that will melt at 120 degrees. This will close the door, but note that the door can still be closed manually when necessary.

The second on our list of LCN fusible link closers is the LCN Door Closer 4020 FL. The 4020 FL Closer has the same color and hand options as the 4010 FL and will be shipped with the same parts. The main difference is that the 4020 FL should be top jamb mounted on the push side of a door.

The third on our list of LCN fusible link closers is the LCN Door Closer 4110 FL. In order to be installed properly, this heavy-duty closer should be parallel arm mounted on the push side of a door.

LCN Fusible Link Arms

Another item we carry is the LCN Fusible Link Arm 3049 FL. This LCN fusible link arm will work on the 4010 FL, 4020 FL and 4110 FL LCN series closers. When ordering this item from our web store, you will want to select the series number of the specific closer you have from the Series # dropdown menu.

The other dropdown menus for this LCN fusible link arm that you will need to consider are Color and Hand. Coloring can be dark bronze or aluminum and the arm can be used on left or right handed closers.

The LCN Fusible Link Arm 3049 FL is equipped with an adjustable nut which will trigger the arm to lock when it reaches a position that has been pre-selected by the user. The link on the arm will keep the door open until it reaches a high temperature that melts causing the door to shut. These arms are good to use on fire rated doors in order to keep a fire from spreading.

Get In Touch About LCN Fusible Links

Please feel free to get in touch with our staff so that we can help you with your online orders. We are available throughout the week to assist you with product questions and order inquiries. 

Our friendly and welcoming team members are always ready to hear your inquiries and/or concerns because we want your shopping experience to go as smoothly as you had hoped it would. Contact our office at Sales@RobertBrooke.com or by calling our phone at (800) 642-2403 and we will answer your pertinent questions.

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  1. LCN Door Closer 4111 FL

    The LCN Door Closer 4111 FL is known as the Smoothee, and is one of the heaviest duty door closers made, the FL stands for Fusible Link. The Fusible Link is a lead clip that melts at roughly 115 degrees, and releases the door so it can close and contain a fire.  If you have a building were you have a high traffic and abusive, especially exterior doors, then this is the closer. The 4111 is an application specific closer, meaning it will only work when mounted on the door, on the push side. This is known as a parallel arm application. The cylinder is fully adjustable and will work on doors up to 56" exterior door, and can be adjust down to ADA required levels. We ship the 4111 FL model, which is a hold open fusible lind, on this page. The cylinder mounting holes are 2-1/2" by 6".

    right hand left hand diagram

    Door Closer Stop Colors

    4110FL
    As low as $487.03
  2. LCN Door Closer 4021 FL

    The LCN Door Closer 4021 FL is shipped with fusible link arm, standard plastic cover, and self reaming and tapping screws. This closer is designed to hold open fire doors, when the fusible link melts, it releases the hold open arm, so the door will close.  Sized cylinders for interior doors to 5’0” and exterior doors to 4’0”. Non-sized cylinder adjustable for interior doors to 4’6” and exterior doors to 3’6”. Included arm has a fusible link that melts at 120 degrees, allowing to door to close. Door can be closed any time with a gentle pull.  Closer mounts top jamb (push side), specify right or left swinging door. 4021 cylinder meets ADA requirements. 

    right hand left hand diagram

    Door Closer Stop Colors

    4020FL
    As low as $487.03
  3. LCN Door Closer 4011FL | LCN 4011 FL

    The LCN Door Closer 4011FL is shipped with fusible link arm, standard plastic cover, and self reaming and tapping screws. Sized cylinders for interior doors to 5’0” and exterior doors to 4’0”. Non-sized cylinder (4011) adjustable for interior doors to 4’6” and exterior doors to 3’6”. Included arm has a fusible link that melts at 120 degrees, allowing to door to close. Door can be closed any time with a gentle pull. Closer mounts hinge side, specify right or left swinging door. 4011 cylinder meets ADA requirements.

    We ship the 4011 FL

    right hand left hand diagram

    Door Closer Stop Colors

    4010FL-
    As low as $487.03
  4. LCN Door Closer Fusible Link Arm 3049FL

    LCN Door Closer Fusible Link Arm

    Adjustable nut allows door closer arm to lock when the preselect position is reached. Fusible Link will hold door until heat melts the "Link" and then the door will shut. Used on Fire Doors to control a spreading fire.

    Specify your current closers model number when ordering.
    Not all of the LCN closers have the same shape spindle on the door closer
    cylinder. The LCN Part #'s on this Fusible Link Arm is: 4010-3049FL, 4020-3049FL, 4110-3049FL

    Door Closer Stop Colors

    right hand left hand diagram

    3049FL
    As low as $243.52
  5. LCN 165 Degree Fusible Link

    The LCN Fusible Link melts at 165 degrees to release the hold open mechanism.   Link measures 1-3/8 long by a 1/2" wide, the center to center distance on the holes is 15/16".

    LCN Part Numbers:
    4010-28
    4110-30
    4020-31

    309LCN
    $15.31
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