Don-Jo SRE-478 Strike Reinforc...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$12.08
Don-Jo SRE-478 Strike Reinforcement Plate 4-7/8" x 1-1/4" 16-Gauge Steel

Don-Jo SRE-478 Strike Reinforcement Plate 4-7/8" x 1-1/4" 16-Gauge Steel

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Model: SRE-478

In Stock (leaves warehouse same day if ordered before 3pm ET)

$12.08
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Don-Jo SRE-478 Strike Reinforcement Plate 4-7/8" x 1-1/4" 16-Gauge Steel

The Don-Jo SRE-478 Strike Reinforcement Plate is a commercial-grade door hardware accessory engineered to strengthen and protect door frames at the strike area. Measuring 4-7/8" in length and 1-1/4" in width, this reinforcement plate is constructed from 16-gauge (.060) steel, delivering the structural integrity required for demanding commercial applications. Designed as a reliable filler plate and wrap-around solution, the SRE-478 is an essential component for door trim and accessory installations where frame reinforcement is critical.

Key Features

  • Precise Dimensions: Measures 4-7/8" in length and 1-1/4" in width, providing accurate coverage and fit for standard commercial door strike applications.
  • Heavy-Duty 16-Gauge Steel Construction: Fabricated from 16 ga. (.060) steel for superior strength, rigidity, and long-term durability in high-traffic commercial environments.
  • Strike Area Reinforcement: Specifically designed to reinforce door frames at the strike zone, reducing the risk of frame damage and improving overall door security.
  • Commercial-Grade Quality: Rated for commercial use, making it suitable for a wide range of professional door hardware installations and upgrades.
  • Filler Plate and Wrap-Around Application: Functions as a filler plate, lock adapter, and wrap-around solution, offering versatility across multiple door trim and accessory configurations.
  • Convenient Shelf Pack: Available in a shelf pack of 10 units, ideal for contractors and facilities managers stocking hardware for multiple installations.

Technical Specifications

  • Subcategory: Filler Plates
  • Product Group: Door Trim and Accessories
  • Product Subgroup: Filler Plates, Lock Adapters and Wrap Arounds
  • Commercial/Residential: Commercial
  • Product Category: Door Trim and Accessories
  • Department: Door Hardware

Typical Applications

  • Commercial Office Buildings
  • Educational Facilities
  • Healthcare Institutions
  • Retail Establishments
  • Industrial and Warehouse Facilities
  • Multi-Tenant Residential Properties
  • Government and Municipal Buildings

Why Don-Jo SRE-478?

Don-Jo strike reinforcement products are built to professional-grade standards, with the SRE-478 featuring 16-gauge (.060) steel construction that delivers the structural strength needed for reliable commercial door frame protection. Engineered for demanding environments where consistent performance and frame integrity are essential, the SRE-478 is a trusted choice for door hardware professionals seeking dependable reinforcement solutions.

Product Specs

Subcategory:
Filler Plates
Product Group:
Door Trim and Accessories
Product Subgroup:
Filler Plates, Lock Adapters and Wrap Arounds
Product Type:
Strike Reinforement
Commercial/Residential:
Commercial
Product Model:
SRE 478
Product Category:
Door Trim and Accessories
Product Substrate:
Steel
Department:
Door Hardware

Don-Jo SRE-478 – Frequently Asked Questions

1) What does a Don-Jo SRE-478 strike reinforcement plate actually do on a door frame?
It's a steel plate that goes on the frame at the strike, spreading the load so kicks and prying don't tear the strike out of the jamb. The SRE-478 is a 4-7/8 x 1-1/4 inch plate in 16 gauge (.060) steel. Two common uses: reinforcing a frame that's still sound but takes heavy traffic, and covering a jamb that's already been chewed up around the strike cutout so a new strike has solid metal behind it.
2) Will the Don-Jo SRE-478 cover a standard 4-7/8 inch ANSI strike cutout?
Yes. The plate is 4-7/8 inches long by 1-1/4 inches wide, which matches the 4-7/8 x 1-1/4 inch ANSI strike prep used on commercial hollow metal frames. If your frame is prepped for a T-strike or a 2-3/4 x 1-1/8 inch residential strike instead, this one won't line up with the existing holes.
3) I'm a property manager with damaged jambs on several suite doors. Do I have to replace the frames or can I use a strike reinforcement plate?
If the damage is confined to the strike area and the jamb is otherwise straight, an SRE-478 plate over the strike gets the opening back in service without pulling the frame. It's 16-gauge (.060) steel at 4-7/8 x 1-1/4 inches, so it lays over the ANSI strike prep and gives the strike screws fresh metal to bite. It comes in a shelf pack of 10, which is how you'd buy it for a run of doors. Where the jamb is bent, split at the anchor, or the frame is racked, a plate doesn't fix that and the frame needs work.
4) Is 16-gauge steel heavy enough for a strike reinforcement on a high-traffic commercial door?
16 gauge works out to .060 inch thick steel, which is heavier than the frame face on most hollow metal jambs and the reason this one is rated for commercial rather than residential use. For office, school, healthcare, retail, warehouse, and multi-tenant openings that see constant cycling, that's the gauge you want behind the strike.
5) What's the difference between a strike reinforcement plate and a door wrap-around plate?
Different sides of the opening. A strike reinforcement like the SRE-478 mounts on the frame, at the strike, and protects the jamb. A wrap-around goes on the door itself and wraps the edge to reinforce the lock bore where the door skin is torn or the bore is worn oversize. If the damage is on the door around the knob or lever, a reinforcement plate on the frame won't help you, and vice versa. Plenty of forced-entry repairs need both.
6) Do I need to mortise the frame to install a Don-Jo SRE-478, or does it surface mount?
The SRE-478 goes on over the existing strike prep. At .060 inch thick it stands slightly proud of the jamb face unless the frame is already mortised deep enough to take both the plate and the strike, so check that your latch still throws fully into the strike after the plate is in. On most hollow metal frames the strike screws pass through the plate and pick up the existing tapped holes or the frame's strike box.
7) How many Don-Jo SRE-478 plates come in a pack?
The SRE-478 ships as a shelf pack of 10, which suits a contractor or facility stocking for a multi-door job rather than a single repair.
How fast can I get the Don-Jo SRE-478 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 Don-Jo SRE-478 come with a warranty?
Absolutely. The Don-Jo SRE-478 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 Don-Jo SRE-478?
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 Don-Jo SRE-478 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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