BEST AF80J Top Jamb Flat Form Arm is a manufacturer-designated replacement and accessory arm for the BEST HD8000 Series heavy-duty surface door closers. Designed for top-jamb (push-side) installations with a 4"–8" reveal, this complete flat-form arm assembly helps contractors and facility maintenance teams select the proper closer arm when standard mounting geometry will not fit.

The AF80J is intended for commercial door openings with a deeper frame reveal. It provides the connection between a compatible HD8000 closer body and the door in the specified top-jamb installation. It is suitable for repair, replacement, and new-installation applications where the manufacturer's template calls for an AF80J arm.

Key Features & Benefits

• BEST HD8000 compatibility: Specifically listed for HD8000 Series surface door closers; not a universal arm for all BEST closer families.
• Top-jamb mounting: Designed for appropriate push-side top-jamb applications.
• 4"–8" reveal: Intended for commercial door openings with a 4- to 8-inch frame reveal.
• Flat-form design: Manufacturer-specified arm geometry for proper operation in its intended mounting arrangement.
• Complete arm configuration: Replacement arm assembly, rather than a complete hydraulic closer.
• Commercial service use: Suitable for replacement, retrofit, and door closer maintenance projects.

Technical Specifications

• Manufacturer: BEST (dormakaba group)
• Model: AF80J
• Product Type: Top-jamb flat-form door closer arm
• Compatible Closer Series: BEST HD8000 only
• Mounting: Top jamb / push side
• Specified Reveal: 4"–8" (102–203 mm)
• Arm Function: Standard flat-form arm; not a designated hold-open arm
• Finish: Specify the required architectural finish when ordering
• Door Closer Body Included: No

Common Applications

• Commercial hollow metal and wood doors equipped with compatible BEST HD8000 closers
• Institutional, educational, healthcare, office, and industrial facilities
• Closer arm replacements and commercial door maintenance
• Top-jamb installations with a deeper 4"–8" reveal

AF80J vs. Other BEST Arms

AF80J is the HD8000 top-jamb flat-form arm for 4"–8" reveals. AF80P is the parallel flat-form arm configuration. FHJ is the separate top-jamb friction hold-open option. Choose the arm specified by the installation template rather than assuming these models are interchangeable.

Installation & Ordering Notes

Before ordering, verify the existing closer is a BEST HD8000 Series model, confirm the reveal measurement and top-jamb installation geometry, and check the manufacturer's mounting template. Select a finish that coordinates with the existing closer and hardware. Hardware and accessories included in the supplied package should be verified with the distributor.

Arm only: This listing does not include the HD8000 hydraulic closer body or cover. Shipping weight and carton dimensions should be confirmed before purchase or fulfillment.

Why Choose the BEST AF80J?

The BEST AF80J provides the manufacturer-designated flat-form arm solution for compatible HD8000 top-jamb door closer installations with a 4"–8" reveal, helping maintain proper arm fit and operation in challenging commercial openings.

Model & Configuration Buying Guide

Product: BEST AF80J Top Jamb Flat Form Arm – HD8000 Door Closer | 4–8 Inch Reveal. Manufacturer/distributor designation: BEST. This product is part of the Door Closer Arm category and should be selected by its actual factory ordering code, intended application and installed door hardware. Use the exact SKU when placing a replacement or construction order.

Available SKUs and Configurations

The arm assembly must match the exact closer model, mounting location, door swing, frame reveal, and opening angle. A regular or top-jamb arm is not a substitute for a parallel arm or a stop/track arrangement. The model in this listing is an arm or arm kit; a complete hydraulic closer body is not included unless the existing description explicitly specifies otherwise.

Model-Specific Features

Check whether this model provides hold-open, non-hold-open, spring stop, cushioned Door Saver, plunger, or track operation. Use the exact product title and SKU when matching the existing arm to the door hardware schedule; physical mounting dimensions and compatible closer body series differ by arm family.

Installer and Replacement Checklist

1. Identify the existing closer body and confirm the named compatible 7000/8000, HD8000, or EHD9000 series as applicable.
2. Measure reveal and top-rail/soffit clearances; identify push-side vs pull-side mounting.
3. Check required fasteners, arm shoe, bracket, parallel plate, spindle/shaft and stop components before ordering.
4. Observe opening-angle limits and available frame clearance; confirm backcheck and door stop requirements for heavy-traffic doors.
5. Verify mechanical hold-open is permitted at the opening; fire-rated doors may require an approved automatic-release arrangement.
6. Retain a compatible closer's hydraulic adjustment schedule and follow current manufacturer installation instructions.

Commercial Door Worx Order Verification

Before purchasing, confirm the existing opening's required hardware function and ordered SKU, and verify the current manufacturer's mounting or wiring instructions. Separate installation, keying, operator integration, compliance, and accessories may be needed beyond the item described. Quantities, finish choices and selling prices are determined by the selected store variant.