Sargent 25-O Door Closer Arm f...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$211.28
$139.00
Sargent 25-O Door Closer Arm for 351, 281, - Standard & Top Jamb Mount

Sargent 25-O Door Closer Arm for 351, 281, - Standard & Top Jamb Mount

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Model: 25O EN
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$211.28
$139.00
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Sargent 25-O Door Closer Arm for 351, 281, 1431 Series - Standard & Top Jamb Mount

Professional Door Closer Replacement Component

The Sargent 25-O Standard Door Closer Arm is engineered for compatibility with Sargent 351, 281, and 1431 Series door closers. This heavy-duty replacement arm supports both standard mount and top jamb applications, delivering reliable performance in commercial, institutional, and high-traffic environments. Crafted from durable materials and designed to meet ADA compliance standards when paired with compatible closers.

Professional Features & Benefits

  • Series Compatibility: Designed specifically for Sargent 351, 281, and 1431 Series door closers for precise fit and optimal performance.
  • Dual Mounting Options: Compatible with both standard mount and top jamb applications for versatile installation flexibility.
  • Heavy-Duty Construction: Durable, long-lasting materials ensure extended service life in demanding commercial applications.
  • OEM Quality: Genuine Sargent replacement part ensures precise compatibility and maintains original closer performance specifications.
  • ADA Compliance Support: Engineered to meet accessibility requirements when installed with matching door closers for code compliance.
  • Smooth Operation: Maintains consistent, controlled door movement for reliable closing performance throughout the door's operational cycle.
  • Easy Installation: Simple replacement design allows for quick maintenance turnaround and minimal downtime.

Technical Specifications

  • Refer to manufacturer documentation for complete technical specifications.

Installation & Operation

This replacement arm is designed for use with compatible Sargent 351, 281, and 1431 Series door closers. Refer to the parent device installation instructions and manufacturer documentation for proper integration. Ensure compatibility with existing hardware before installation.

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 Sargent Quality?

Sargent door closer components deliver professional-grade reliability with heavy-duty materials engineered for demanding commercial applications. This genuine OEM replacement arm maintains precise compatibility with 351, 281, and 1431 Series closers while supporting ADA compliance requirements. Trusted by maintenance professionals and contractors for consistent performance where dependable door operation is essential.

Product Specs

Grade:
Grade 1
Product Type:
Door Closer Arms
Duty Level:
Heavy Duty
Product Group:
Door Controls
Product Subgroup:
Parts and Accessories
Subcategory:
Parts and Accessories
Commercial/Residential:
Commercial
Product Category:
Door Controls
Department:
Door Hardware

Parts & Accessories

    Sargent 25O EN – Frequently Asked Questions

    1) Which Sargent door closers does the 25-O arm fit?
    The 25-O is a standard closer arm for Sargent 351, 281, and 1431 Series closers. It's the OEM arm for those bodies, so if the closer on the door is one of those three families, this is the arm that goes back on it. Arms are not interchangeable across closer families, so a 25-O will not serve as a replacement on a non-Sargent body.
    2) Can the Sargent 25-O arm be used in a top jamb mount, or only regular arm mount?
    Both. The 25-O supports standard (regular arm) mounting on the pull side of the door and top jamb mounting on the push side. That covers the two most common ways a 351 or 281 gets hung when there's no room for a parallel arm application. For a top jamb install you'll also want the Sargent 351A top jamb mounting plate, which is the companion part for that application.
    3) Is the 25-O a hold-open arm or a plain non-hold-open arm?
    It's a plain standard arm with no hold-open function, so the door closes every time it's released. If the opening needs the door to stand open, that's a different arm assembly: an adjustable hold-open arm such as the LCN 1250-3049/PA (1250 Series, non-handed with adjustable hold open) or the LCN 4010-3049 with adjustable elbow. Note those are LCN arms for LCN closer bodies, not substitutes on a Sargent 351 or 281. Fire-rated openings should not get a mechanical hold-open arm at all.
    4) Will a Sargent 25-O arm work on an LCN or Falcon door closer?
    No. Closer arms are matched to the body they mount on, and the 25-O is cut for Sargent 351, 281, and 1431 bodies only. For other brands you need that brand's own arm: LCN 4000T-3077T for the 4000T Series, LCN 1260-3077 regular arm with parallel arm bracket for the 1260 Series, Falcon SC70A-3049/PA for SC70A Series closers, or Falcon SC60A-3049DS for the SC60A Series. Match the arm to the series stamped on the closer cover.
    5) What is the difference between the Sargent 25-O closer arm and the LCN 4000T-3077T arm?
    Both are standard (regular) arm replacement components for surface door closers, but they belong to different closer families and are not interchangeable. The Sargent 25-O is a standard arm built for Sargent 351, 281 and 1431 Series closers and supports standard and top jamb mounting. The LCN 4000T-3077T is a standard arm replacement component for the LCN 4000T Series. Match the arm to the closer body already on the door: a Sargent 351 body takes the 25-O, an LCN 4000T body takes the 4000T-3077T.
    6) I need a hold-open arm instead of a standard closer arm - what should I use?
    The Sargent 25-O is a standard arm, so it closes the door on every cycle and does not hold the door open. For a hold-open function, the arm has to come from the matching closer's own family: the LCN 1250-3049/PA is a hold open arm assembly with a parallel arm shoe and adjustable hold open in a non-handed design, the LCN 4010-3049 is a hold open arm with an adjustable elbow, and the Falcon SC70A-3049/PA is a hold open arm with a PA bracket for SC70A Series closers. Pick the one that matches the closer body on the door - hold-open arms are not cross-brand substitutes for a Sargent 351, 281 or 1431 closer.
    7) Can I mount the Sargent 25-O arm in a parallel arm application?
    The 25-O is built for standard mount and top jamb applications on Sargent 351, 281 and 1431 Series closers. Parallel arm work uses an arm supplied with a parallel arm bracket or shoe - for example the LCN 1260-3077 is a regular arm with a parallel arm bracket for the 1260 Series, and the LCN 1250-3049/PA is a hold open arm assembly with a parallel arm shoe. Those brackets are part of their own closer families, so the mounting decision and the closer brand travel together.
    8) My closer is a floor-pivoted center hung door - does the Sargent 25-O work?
    No. The 25-O is a surface closer arm for standard and top jamb mounted Sargent 351, 281 and 1431 Series closers. A center hung, floor pivoted opening uses pivot and end load arm hardware instead - the Falcon OHC100A-DP is a center hung floor pivot with end load arm for OHC100 Series door closers. Confirm how the door is hung before ordering an arm, because surface arm hardware and center hung pivot hardware are not substitutes.
    9) Is the Sargent 25-O closer arm handed?
    No handing to specify on the 25-O. Order it by finish only, and it works on either a left or right hand door in the mounting applications the arm supports. That means one part number covers both swings across a building's openings.
    10) What finishes does the Sargent 25-O arm come in, and how do I match the closer already on the door?
    Five sprayed enamel finishes: EAB sprayed brass enamel, EN sprayed aluminum enamel, EP sprayed bronze enamel to match satin bronze, EB sprayed bronze enamel to match dark satin bronze, and ED sprayed bronze enamel to match dark statuary bronze. These are painted enamel coatings meant to match the closer body, so match the finish code on the existing closer rather than eyeballing the color. The three bronze options are distinct shades and will not blend with each other on the same elevation.
    11) Is the Sargent 25-O arm heavy enough for a high traffic entrance or a school corridor?
    It's a Grade 1, heavy duty, commercial rated component, which is the top duty class for door hardware and what a school corridor, hospital, or office entrance calls for. That's the same grade level the 351 and 281 closer bodies are used at, so the arm isn't the weak link on a high cycle opening.
    12) Do I need anything besides the arm to convert a Sargent 351 closer to top jamb mount?
    The arm handles the linkage, but a top jamb install also needs the mounting plate that carries the closer body on the frame face. For the 351 that's the Sargent 351A top jamb mounting plate. On a regular arm (pull side) install you're generally reusing the existing shoe and screw pack, so the arm alone is the replacement.
    13) My door closer arm is bent, do I have to replace the whole closer?
    No. The arm is a separate serviceable assembly, and on a Sargent 351, 281, or 1431 the 25-O standard arm swaps in without touching the closer body, so the existing hydraulic body, its spring size, and its valve settings all stay as adjusted. That's the usual repair after a door gets blown open past its stop, since the arm is built to fail before the body does.
    14) The door needs to stop against a wall - is a standard closer arm the right choice?
    A standard arm like the Sargent 25-O controls closing but does not build in a stop, so the door swing has to be limited by a wall stop or floor stop. Where the arm itself needs to take the stop, that is a dead stop parallel arm: the Falcon SC60A-3049DS is a hold-open dead stop parallel arm assembly for SC60A Series closers. Dead stop arms are matched to their own closer series, so confirm the closer body before ordering.
    15) Is the Falcon 8230-3077PLCM arm an alternative to the Sargent 25-O?
    No. The Falcon 8230-3077PLCM is a standard arm with track for 8230 Series automatic door operators, so it serves a powered operator rather than a manual surface closer. The Sargent 25-O is a standard arm for manually operated Sargent 351, 281 and 1431 Series closers in commercial, heavy duty service. An arm-with-track for an operator and a standard arm for a surface closer solve different openings and do not cross over.
    16) Does swapping in a 25-O arm affect ADA opening force compliance?
    The 25-O supports ADA compliance when it's installed on a matching Sargent closer, since the arm restores the original mechanical geometry the closer was set up with. Opening force is a function of the closer's spring size and valve adjustment, not the arm, so after fitting the arm you re-verify force at the door and adjust the closer if needed.
    17) Is this a genuine Sargent part or an aftermarket arm?
    Genuine Sargent OEM. For a distributor or a facility standardizing on Sargent door controls, that matters because the arm holds the original closer performance specification rather than approximating it, and it keeps the opening on one manufacturer's parts list for future service.
    18) Do hold open arms like the LCN 1250-3049/PA need to be handed?
    The LCN 1250-3049/PA hold open arm assembly with parallel arm shoe is a non-handed design with adjustable hold open, so one part covers left and right hand openings within the 1250 Series. The Sargent 25-O is a standard arm for 351, 281 and 1431 Series closers in standard and top jamb mount, ordered by finish rather than by hold-open adjustment. Handing questions are answered by the arm's own series, so verify the closer body before treating any of these as equivalent.
    How fast can I get the Sargent 25O EN 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 Sargent 25O EN come with a warranty?
    Absolutely. The Sargent 25O EN 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 Sargent 25O EN?
    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 Sargent 25O EN 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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