Stanley Security Grade 1 Surface Closer, Size 2-6, Heavy Duty Arm with Stop

All three standard mountings are covered: hinge (pull side), top jamb (push side), and parallel arm (push side). So the D-4550 handles either side of the opening. The default mounting location on the closer as supplied is pull side, and parallel arm is the usual choice on a push-side application where you want the closer body tucked up under the frame head and out of the way of traffic.

Yes, the D-4550 is listed as ADA compliant. Because the spring power is adjustable across sizes 2 through 6, you can dial the closing force down for an accessible interior opening and still have the range to set it heavier on an exterior door that fights wind. Sizing is what gets ADA openings wrong, not the closer itself, so set the spring to the lowest size that still closes and latches the door.

The D-4550 uses all-weather hydraulic fluid, which is what keeps closing speed consistent when temperature swings between a cold morning and a hot afternoon. Straight-fluid closers thicken in the cold and the door stops latching. Combined with the powder coat finish on the body and the size 2-6 spring range, it is built for exterior service entrances and vestibules, not just conditioned interior corridors.

The D-4550 is Stanley's best performing heavy duty closer, with a cylinder body of R-14 silicon aluminum alloy specifically for institutional applications. Size 2-6 spring range covers everything from a light interior door up through a wide, heavy exterior leaf. For a school corridor, hospital wing, or apartment building common door getting constant use, this is the duty class you want rather than a light duty closer sized 1-4.

The Stanley D-4550 is a Grade 1 heavy duty surface mounted closer covering spring sizes 2 through 6 with a heavy duty arm and stop. Close peers at the same duty level and grade include the BEST HD8000 Series heavy duty surface mounted closer with Grade 1 certification, the Sargent 1431 Powerglide heavy duty surface closer with adjustable spring power, the Falcon SC71A Series heavy duty surface mount closer at Grade 1, and the LCN 1460T heavy duty surface mounted closer in a powder coat finish at Grade 1. All four are heavy duty Grade 1 surface closers, so they land in the same application band as the D-4550 on institutional openings.

The Stanley D-4550 covered here is the heavy duty arm with stop configuration, which is a stop arm rather than a hold open arm. Where the door has to stand open, the Accentra 51 Series industrial closer is supplied with a tri-packed hold open arm at size 1 through 6, and the Orca Hardware BHDC1958 Series hold open closer with parallel bracket carries a tri-packed hold open arm for a 1-3/4 inch door. For a timed close rather than a latch-back hold, the Orca BHDC1958 and BHDC2011 delayed action versions use a tri-packed non-hold open arm with a regular arm and parallel bracket.

The Stanley D-4550 heavy duty closer is built around spring sizes 2 through 6. Where an opening needs the lighter size 1 end of the range, the BEST EHD9000 Series extra heavy duty surface closer carries adjustable spring sizes 1 through 6, the Norton Rixson 8501A Grade 1 tri-mount surface closer carries an adjustable size 1 through 6 spring, the Imperial USA TC4300 Series is a Grade 1 heavy duty size 1 through 6 ADA closer, and the Accentra 51 Series industrial closer covers size 1 through 6 with a hold open tri-packed arm. The wider range matters on a narrow or interior leaf that would be overpowered at size 2.

The Stanley D-4550 is configured with a heavy duty arm with stop, which takes the overswing at the arm. Where the opening already has its own stop and a plain arm is wanted instead, heavy duty peers with a non-hold-open arm include the Design Hardware 116 Series and 416 Series heavy duty closers, both with a tri-packed non-hold open arm, and the Dorma 8916-JT Grade 1 heavy duty closer with a flat non-hold open arm. The Dormakaba 8616 AF86P FC SNB1 689 is a Grade 1 heavy duty closer with a flat arm non-hold open arm supplied tri-pack. Doubling a stop arm against a wall stop is what you are avoiding by choosing one of these.

No. The Stanley D-4550 is a Grade 1 heavy duty surface closer with an R-14 silicon aluminum alloy cylinder body built for institutional applications. The Cal-Royal 400 Series commercial hydraulic closer is Grade 2, and the Falcon SC91A Series is a Grade 3 light duty cast aluminum surface closer. Both are surface mounted closers that look the part on a door, but a Grade 1 specification on a drawing is not satisfied by either. If Grade 1 is what the spec calls for in a Cal-Royal, the 500S barrier free closer with adjustable back-check and the 700S dual valve sized closer with adjustable tube arm are both Grade 1.

The Stanley D-4550 is ADA compliant, commercial, and Grade 1 with all-weather fluid. Other ADA closers in the same Grade 1 band include the Imperial USA TC4300 Series, a Grade 1 heavy duty size 1 through 6 ADA closer; the Calibre CA9901, a Grade 1 tri-pack arm size 2 through 5 ADA surface mount closer; the Calibre CA4001 adjustable spring tension ADA hydraulic closer at Grade 1; and the Cal-Royal N900PBF 900 Series barrier free Grade 1 hydraulic surface closer. Cal-Royal's 500S is also a Grade 1 barrier free closer. Note the Calibre CA9901 shares the D-4550's size 2 through 5 coverage but stops short of size 6.

Sargent's heavy duty Grade 1 offerings are the closest match to the Stanley D-4550, which is built for institutional applications with all-weather fluid. The Sargent 1431 Powerglide is a heavy duty Grade 1 surface closer with adjustable spring power, and the Sargent 281 Powerglide is a heavy duty Grade 1 surface closer with a cast iron body and heavy duty construction. The Sargent 1131 and 1331 are both Grade 1 medium duty adjustable surface closers, the 1131 for medium traffic commercial applications and the 1331 with a universal aluminum body, which puts them a duty level below the D-4550.

The heavy duty arm with stop builds the door stop into the closer arm itself, so the arm limits how far the door can swing instead of relying on a separate floor or wall stop. On a parallel arm push-side mount that is how you protect the closer and the door from being thrown open into a wall. If the opening already has a reliable wall or floor stop, a plain heavy duty arm without the stop feature is the simpler order.

Commercial. The D-4550 is classified as a commercial closer and Stanley positions it for institutional applications. For a light residential or low-traffic interior door, a lighter closer is the more sensible spec: the Falcon SC91A is Grade 3 light duty, and the LCN 1250 Series covers light duty sizes 1-5 with all-weather fluid.

A surface closer like the D-4550 mounts entirely on the face of the door or frame, so it needs no frame or door prep beyond drilling and tapping for the mounting holes. That is why it is the retrofit choice on existing openings. A slide track or jamb track arm closer gives a lower profile look and a straighter arm projection; the Corbin Russwin DC5230 is a Grade 1 slide track arm closer for pull side mounting, and the Dorma 8916-JT is a Grade 1 heavy duty jamb track version for frame face mounting, both for 1-3/4 inch doors on the Corbin. Track arms generally do not offer a built-in stop the way the D-4550 heavy duty arm with stop does.

The Stanley D-4550 is Stanley's best performing heavy duty closer, specified for institutional applications. On an interior or low traffic opening that does not need that, lighter peers include the BEST SL6000 Series Grade 1 light duty surface closer, the Arrow DC314 Grade 1 light duty surface closer from the DC300 Series, the Norton Rixson 160 Series light commercial surface closer at Grade 1, and the LCN 1250 Series light duty surface closer with sizes 1 through 5 and all-weather fluid. The BEST HD7000 Series sits between them as a Grade 1 medium duty closer with adjustable spring power and backcheck control.

The Stanley D-4550 is the complete Grade 1 heavy duty surface closer with the heavy duty stop arm. The LCN 1260-series items that accompany it are arm and mounting components, not closers: the 1260-3049 hold open arm assembly, the 1260-3077 regular arm with parallel arm bracket, the 1260-62PA parallel arm mounting shoe, the 1260-18QF quick fix bracket kit and the 1260-72 slim line plastic cover. The closer body in that family is the LCN 1261, a surface mounted light to medium duty closer with adjustable spring sizes 1 through 5 and cast iron construction, which is a different duty level from the D-4550. Ordering a 1260 part number when you need a closer gets you a bracket.

The Stanley D-4550 is a heavy duty surface closer with an iron substrate and a powder coat finish, mounted hinge side pull, top jamb push, or parallel arm push. For an aluminum storefront leaf specifically, the Norton Rixson 1600 Series aluminum storefront closer is a Grade 1 heavy duty unit with tri-style mounting. Where a slide track rather than an exposed arm is wanted at the head, the Corbin Russwin DC5230 is a Grade 1 surface closer with a slide track arm standard and pull side mounting for a 1-3/4 inch door. Narrow top rails and glass stops are what drive that choice.

The Stanley D-4550 mounts surface hinge side on the pull side, top jamb on the push side, or parallel arm on the push side. Peers supplied for all three positions include the Dexter DCH1000 Series Grade 1 surface closer, tri mount with a full cover, and the Dexter DCH4000, DCL2000 and DCM1000 Series Grade 1 tri mount closers; the Arrow DCN325 Grade 1 surface closer, regular or parallel arm tri-pack, adjustable spring size 1 through 6; and the Accentra 2701 Series architectural closer with tri-pack mounting and adjustable spring sizes 1 through 6. The Norton Rixson 1601P is a Grade 1 medium duty tri-mount closer with a 180 degree swing where the opening has to swing that far.

The Stanley D-4550 is finished in powder coat and offered in 689 aluminum painted and 695 dark bronze painted. Among peers, the Dexter DCH1000 Series Grade 1 surface closer is specified with a full cover and the Design Hardware 316 Series is a medium to heavy duty closer supplied with a cover, while the Arrow DCN314 and DCN325 Grade 1 surface closers are both sold less cover with a regular or parallel arm tri-pack. If a project requires a covered cylinder for appearance in a public corridor, the less-cover units need that addressed separately.

All are Grade 1 surface mounted closers. The Stanley D-4550 uses an R-14 silicon aluminum alloy cylinder body with an iron substrate and a heavy duty stop arm at sizes 2 through 6. The Corbin Russwin DC3200 is a Grade 1 closer with a regular arm and surface mounting for a 1-3/4 inch door, while the DC6200 Series and DC8200 Series are Grade 1 surface closers with a double lever regular arm and pull side mounting, also for a 1-3/4 inch door. The difference a distributor cares about is arm geometry and series identity rather than the certification, since the grade matches across the set.

Where a heavy duty closer is more than the opening needs, the medium duty Grade 1 peers are the Dormakaba 7303 Series surface mounted standard duty closer, the Dormakaba 7414 closer at size 1 through 4, and the Falcon SC81A Series medium duty cast aluminum surface mount closer. The Falcon SC61A Series is Grade 1 at light to medium duty in cast aluminum. Against these, the Stanley D-4550 remains the heavy duty option at sizes 2 through 6 with a heavy duty stop arm, so the step down also narrows the spring range in the 7414's case.

Two: 689 aluminum painted and 695 dark bronze painted, both powder coat. 689 is the standard match for clear anodized aluminum storefront and most hollow metal frames painted light; 695 goes with dark bronze anodized aluminum entrances. For a property manager standardizing a building, pick the one that matches the existing frames and door hardware so replacements down the line stay consistent.

The cylinder body is R-14 silicon aluminum alloy, which Stanley specifies for strength and durability on institutional work, and the closer's substrate is listed as iron. The outside is powder coated rather than plated, so it holds up better to washdown and weather exposure than a painted finish. If your spec calls out a cast iron body specifically, the Sargent 281 Powerglide is the cast iron heavy duty option.

The Deltana DC10, DC40, DC50 and DC70 are door closers, but they are not described at the duty level or grade the Stanley D-4550 carries, which is a Grade 1 heavy duty commercial closer for institutional applications with an R-14 silicon aluminum alloy cylinder. For a commercial opening where the submittal has to show a heavy duty Grade 1 closer, the direct swaps are peers stated as such: the BEST HD8000 Series, the Falcon SC71A Series, and the LCN 1460T. Match the closer to the duty the opening sees rather than to the look of the cylinder.