Don-Jo AR-335 Conversion Plate...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$25.76
$15.92
Don-Jo AR-335 Conversion Plate, 3-1/2" Diameter, 11 Gauge Steel for Commercial Door Applications

Don-Jo AR-335 Conversion Plate, 3-1/2" Diameter, 11 Gauge Steel for Commercial Door Applications

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Model: AR-335-605
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$25.76
$15.92
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Don-Jo AR-335 Conversion Plate — 3-1/2" Diameter, 11 Gauge Steel

The Don-Jo AR-335 is a heavy-duty steel Conversion Plate engineered for commercial door applications where existing hardware cutouts require coverage or adaptation. Measuring 3-1/2" in diameter and constructed from 11-gauge (0.125") steel, this plate delivers the structural integrity needed for demanding commercial environments. Classified under Filler Plates, Lock Adapters, and Wrap Arounds, the AR-335 is a reliable solution for door trim and accessory needs across a wide range of commercial installations.

Key Features

  • Precise 3-1/2" Diameter: Engineered to cover standard door hardware cutouts with a clean, professional finish suited to commercial door applications.
  • Heavy-Gauge Steel Construction: Fabricated from 11-gauge (0.125") steel for exceptional strength, rigidity, and long-term durability in high-traffic commercial settings.
  • Conversion Plate Design: Provides a practical solution for adapting or concealing existing door prep cutouts, supporting hardware upgrades and replacements without full door replacement.
  • Commercial-Grade Quality: Rated and designed for commercial use, making it appropriate for office buildings, educational facilities, healthcare institutions, and other demanding environments.
  • Convenient Shelf Pack Quantity: Available in shelf packs of 10, ideal for contractors and facilities managers handling multiple door installations or maintenance projects.
  • Versatile Door Trim Accessory: Categorized within Door Trim and Accessories — Filler Plates, Lock Adapters, and Wrap Arounds — for broad compatibility with standard commercial door hardware configurations.

Technical Specifications

  • Product Group: Door Trim and Accessories
  • Product Subgroup: Filler Plates, Lock Adapters and Wrap Arounds
  • Commercial/Residential: Commercial
  • Subcategory: Filler Plates, Lock Adapters and Wrap Arounds
  • Product Diameter: 3 1/2"
  • 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 AR-335?

Don-Jo Conversion Plate products like the AR-335 are built to professional-grade standards, utilizing 11-gauge (0.125") steel construction that withstands the rigors of commercial door hardware applications. Engineered for reliability and ease of installation, the AR-335 is a trusted choice for contractors and facilities professionals who demand consistent performance and a clean finished appearance on every project.

Product Specs

Product Group:
Door Trim and Accessories
Product Subgroup:
Filler Plates, Lock Adapters and Wrap Arounds
Product Type:
Conversion Plate
Commercial/Residential:
Commercial
Subcategory:
Filler Plates, Lock Adapters and Wrap Arounds
Product Model:
AR 335
Product Diameter:
3 1/2"
Product Category:
Door Trim and Accessories
Product Substrate:
Steel
Department:
Door Hardware

Don-Jo AR-335-605 – Frequently Asked Questions

1) What is the Don-Jo AR-335 conversion plate actually used for on a commercial door?
The AR-335 is a round steel filler plate, 3-1/2 inches in diameter, used to cover or adapt an existing hole in a door where hardware has been changed or removed. It is the plate, not the lock. Typical use is a leftover bore or a knob prep left behind after a hardware swap, so the door doesn't have to be replaced or filled and refinished.
2) How thick is the Don-Jo AR-335 plate, and is it heavy enough for a high-traffic opening?
It is 11 gauge steel, 0.125 inches thick. That is a solid, rigid plate rather than a thin cover, so it holds its shape on a school corridor, hospital, or apartment turnover door where a light stamped cover would dish or dent. The trade-off is that it stands proud of the door face by that 1/8 inch, which matters if you are mounting other trim over it.
3) What finishes does the Don-Jo AR-335 come in, for matching the rest of my door hardware?
Three finishes: 605 polished brass, 613 oil rubbed bronze, and 630 satin stainless steel. Those are BHMA finish codes, so 630 will sit alongside the satin stainless levers and closers on most commercial openings, and 613 matches oil rubbed bronze lever trim. If you are standardizing a building, pick the code that already appears on your existing hardware rather than matching by eye.
4) Is a round conversion plate the right fix, or do I need a wrap around plate instead?
Different jobs. A round plate like the AR-335 covers a hole, one face at a time, and does nothing structural. A wrap around plate folds over the edge of the door and reinforces a lock prep that has been kicked in or worn out, and it carries the lock hardware through it. If the door is sound and you just have an orphaned 3-1/2 inch or smaller cutout showing, the round plate is the cheaper and cleaner answer. If the prep itself is damaged, you want the wrap around.
5) Does the Don-Jo AR-335 work on both sides of the door, and do I need two?
The plate is a single round steel disc that covers one face. If the old hardware was bored through, the hole shows on both sides, so you need two plates per door, one each side, in the same finish. Buying by the 10-pack covers five doors that way.
6) I have a whole building of doors to patch after a lock changeover. Is the AR-335 sold in bulk?
It comes in shelf packs of 10, which is the useful count for a property manager or contractor working through a run of openings rather than a single door. Order the same finish code across the batch so the corridor reads consistent.
7) Can I use the AR-335 on a residential interior door?
Physically it will fit a 2-1/8 inch bore in any door, but this is specified as commercial hardware, and 11 gauge steel is heavier than a house door needs. It is built for office, school, healthcare, retail, and multi-tenant openings. For a home interior door a lighter filler plate does the same job with less bulk.
How fast can I get the Don-Jo AR-335-605 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 AR-335-605 come with a warranty?
Absolutely. The Don-Jo AR-335-605 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 AR-335-605?
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 AR-335-605 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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