Stanley Security D-3550/D-4550 Angle Bracket, Parallel Arm Bracket, Flush Transom Mount

It is the parallel arm bracket for flush transom conditions on Stanley Security D-3550 and D-4550 surface door closers. When the closer is mounted parallel arm on the push side and the frame has a flush transom with no usable soffit face, this angle bracket gives the arm a mounting surface. It is a bracket only, not a closer, so the closer body and arm are ordered separately.

The Norton Rixson 8501A is the nearest match in intent: it is a Grade 1 tri-mount surface closer with an adjustable size 1-6 spring, rated medium duty. The Sargent 1331 is another Grade 1 medium duty surface closer with a universal aluminum body. The Stanley D-3550/D-4550 mounts surface hinge (pull side), top jamb (push side), or parallel arm (push side), so any of these tri-mount peers will cover the same three mounting conditions on a standard commercial opening.

Two peers are specified with hold open arms. The Accentra 51 Series is furnished with a tri-packed hold open arm and covers adjustable sizes 1-6. The Orca Hardware BHDC1958HO/PA is a hold open door closer supplied with a parallel bracket, listed for 1-3/4 inch doors. Both give you the same hold open behavior as the Stanley unit; the Accentra ships tri-packed so you can still choose the mounting at the opening, while the Orca is set up specifically for parallel arm mounting.

Step up to an extra heavy or heavy duty body. The BEST EHD9000 Series is a Grade 1 extra heavy-duty surface closer with adjustable spring sizes 1-6, the Sargent 1431 Powerglide is a Grade 1 heavy-duty surface closer with adjustable spring power, and the Falcon SC71A is a Grade 1 heavy-duty surface-mount closer. The LCN 1460T is also a heavy duty Grade 1 commercial closer in a powder coat finish. All keep Grade 1 certification while adding duty level over a standard commercial body.

Consider a track arm closer. The Corbin Russwin DC5230 is a Grade 1 surface closer furnished with a slide track arm as standard for pull side mounting on 1-3/4 inch doors, and the Dorma 8916-JT is a Grade 1 heavy duty closer with a jamb track for frame face mounting on the pull side, adjustable size 1-6. A track arm keeps the hardware tight to the frame where a projecting parallel arm and bracket will not clear.

You only need the angle bracket when the frame soffit will not take the parallel arm shoe directly, which is the usual case with a flush transom above the door. On a standard frame with an open soffit the parallel arm shoe mounts to the frame face and no angle bracket is required. Check the head condition before ordering: flush transom means bracket, plain soffit generally does not.

Bracket only. This is an accessory for a Stanley Security surface mounted commercial door closer, so if you are replacing a failed closer you need the closer itself. Complete Grade 1 surface closers we carry include the Corbin Russwin DC8200 Series and the Sargent 1431 Powerglide heavy duty closer.

If the closer is not a Stanley D-3550 or D-4550, this bracket is not the part. Go to a bracket made for the closer on the door, or switch to a pull side hinge mount closer where the transom is not in the way. Among closers we carry, the Corbin Russwin DC5230 Series uses a slide track arm with pull side mounting, and the Corbin Russwin DC6200 Series is a pull side double lever regular arm closer.

For lighter interior openings, the LCN 1250 Series is a light duty surface closer with adjustable spring sizes 1-5, all-weather fluid and ADA compliance. The BEST SL6000 Series is a Grade 1 light duty surface closer with adjustable spring sizes, and the Arrow DCN314 is a Grade 1 light duty tri-pack closer with adjustable spring size 1-4. The Stanley unit shares the all-weather fluid and ADA compliance of the LCN 1250, so the trade is spring range and duty level rather than fluid or accessibility behavior.

No. The Arrow DCN500DP is a parallel drop plate made for the Arrow DCN500 closer, so it is matched to that body's mounting pattern rather than to Stanley's. The Stanley D-3550/D-4550 angle bracket, parallel arm bracket and flush transom mount are the brackets for the Stanley closer body itself. Drop plates and brackets are not cross-brand interchangeable; order the bracket built for the closer that is on the door.

The Cal-Royal 500S is a Grade 1 barrier free closer with adjustable back-check, the Cal-Royal N900PBF is a Grade 1 barrier free hydraulic surface closer, and the Calibre CA4001 is a Grade 1 hydraulic closer with adjustable spring tension specified for ADA. The Calibre CA9901 is a Grade 1 tri-pack arm ADA closer in sizes 2-5. The Stanley D-3550/D-4550 is likewise ADA compliant, so any of these hold the accessibility requirement while changing body and arm configuration.

Several peers adjust across the full 1-6 spring range from one body: the Norton Rixson 8501A Grade 1 tri-mount, the Accentra 51 Series tri-packed hold open, the Accentra 2701 Series architectural closer with tri-pack mounting, the Arrow DCN325 Grade 1 tri-pack, the BEST EHD9000, and the Imperial USA TC4300 heavy duty ADA closer. Stocking one adjustable tri-mount body lets maintenance set spring power at the opening rather than carrying separate sizes.

689 aluminum painted is the finish offered, which is the standard painted aluminum look that matches most commercial closers and frames on a back-of-house or stairwell opening. There is no other finish choice on this bracket.