Adams Rite 28-0019-MP 4550 MS ...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$54.00
$44.88
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Adams Rite 28-0019-MP 4550 MS Deadlock Handle Return Spring Replacement Part

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Model: 28-0019-MP

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

$54.00
$44.88
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Adams Rite 28-0019-MP 4550 MS Deadlock Handle Return Spring Replacement Part

The Adams Rite 28-0019-MP is a genuine OEM handle return spring designed specifically as a replacement lever part for the Adams Rite 4550 MS Deadlock series. This commercial-grade replacement component ensures the lever handle returns to its proper resting position after operation, maintaining smooth and reliable lock function. Sourced directly from Adams Rite, this part is engineered to exact factory specifications for seamless compatibility with the 4550 MS Deadlock platform.

Key Features

  • OEM Compatibility: Engineered specifically for the Adams Rite 4550 MS Deadlock series, ensuring precise fit and reliable performance without modification.
  • Genuine Adams Rite Part: Factory-sourced replacement component manufactured to original design specifications for consistent, dependable operation.
  • Handle Return Function: Restores proper lever return action, ensuring the handle resets smoothly after each operation cycle.
  • Commercial-Grade Construction: Designed for commercial door hardware applications where durability and consistent performance are required.
  • Rings, Spindles and Springs Category: Classified as a precision mechanical spring component within the Adams Rite parts ecosystem, maintaining the mechanical integrity of the lock assembly.
  • Direct Replacement: Serves as a drop-in replacement part, simplifying maintenance and minimizing downtime for facilities requiring lock servicing.

Technical Specifications

  • Department: Door Hardware
  • Product Category: Mechanical Locks
  • Product Group: Parts and Accessories
  • Subcategory: Parts and Accessories
  • Product Subgroup: Parts and Accessories
  • Product Type: Rings, Spindles and Springs
  • Parts and Accessories Type: Replacement Parts
  • Commercial/Residential: Commercial
  • Product Model: 28-0019-MP
  • Features: Adams Rite Parts

Typical Applications

  • Commercial Office Buildings with Adams Rite 4550 MS Deadlock installations
  • Retail Storefronts and Glazed Door Entrances
  • Educational Facilities Requiring Lock Maintenance and Servicing
  • Healthcare Institutions with Commercial Deadlock Hardware
  • Industrial and Warehouse Facilities Maintaining Perimeter Security Hardware
  • Multi-Tenant Residential and Mixed-Use Properties
  • Government and Municipal Buildings Servicing Existing Adams Rite Hardware

Why Adams Rite 4550 MS Deadlock?

Adams Rite is a trusted name in commercial door hardware, and the 4550 MS Deadlock series is engineered for demanding commercial environments. By using genuine Adams Rite replacement parts like the 28-0019-MP handle return spring, facility managers and technicians can be confident that serviced hardware will perform to original factory standards. Maintaining locks with OEM components preserves the mechanical reliability and longevity that the 4550 MS Deadlock platform is designed to deliver.

Manufacturer Resources

Product Specs

Department:
Door Hardware
Product Category:
Mechanical Locks
Product Group:
Parts and Accessories
Subcategory:
Parts and Accessories
Product Subgroup:
Parts and Accessories
Product Type:
Rings, Spindles and Springs
Parts and Accessories Type:
Replacement Parts
Commercial/Residential:
Commercial
Product Model:
28-0019-MP
Features:
Adams Rite Parts

Adams Rite 28-0019-MP – Frequently Asked Questions

1) Will the 28-0019-MP fit any Adams Rite lock, or only the 4550?
Only the 4550 MS Deadlock series. The 28-0019-MP is an OEM part made to Adams Rite factory dimensions for that platform, and it is not offered as a universal spring for other Adams Rite lock families. If you are servicing a different Adams Rite deadlock or deadlatch, match the spring to that lock's own parts breakdown.
2) My 4550 lever won't return after I turn it. Do I need a whole new lock?
Usually not. A lever that fails to spring back on a 4550 MS Deadlock is most often a broken or tired handle return spring, and the 28-0019-MP replaces just that component. Swapping the spring is a maintenance repair rather than a full lock replacement, which keeps the existing cylinder, keying, and door prep untouched.
3) Is the Corbin Russwin swivel spindle pin and set screw an alternative to the Adams Rite 28-0019-MP handle return spring?
No. The Adams Rite 28-0019-MP is a handle return spring made specifically for the Adams Rite 4550 MS Deadlock series, and its job is to reset the lever to its resting position after each operation. The Corbin Russwin 499F838 is a swivel spindle pin with a set screw, a spindle retention part rated for 1-3/4 inch door thickness. They serve different mechanical functions in different lock platforms, so one will not stand in for the other. If the lever on a 4550 MS Deadlock is not returning, the 28-0019-MP is the part to order.
4) Is this a genuine Adams Rite part or an aftermarket spring?
Genuine OEM. The 28-0019-MP is factory-sourced from Adams Rite and built to the original design specification, so it drops into the 4550 without filing, bending, or shimming. That matters on storefront hardware where a slightly off spring rate leaves the lever sitting low.
5) My lever is loose on the spindle rather than failing to return - which part do I need?
A lever that is loose or slipping on the spindle is usually a spindle retention issue, which is what a swivel spindle pin and set screw such as the Corbin Russwin 499F838, listed for 1-3/4 inch doors, addresses on that platform. The Adams Rite 28-0019-MP is a return spring: it restores the lever's reset action on a 4550 MS Deadlock and will not tighten a lever that has play on the spindle. Diagnose whether the fault is return action or spindle engagement before ordering.
6) Does the Adams Rite 28-0019-MP have a door thickness limit like the Corbin Russwin 499F838 does?
Door thickness matters for a spindle part because the spindle has to span the door - the Corbin Russwin 499F838 swivel spindle pin and set screw is specified for 1-3/4 inch doors for that reason. The Adams Rite 28-0019-MP is an internal return spring that sits inside the 4550 MS Deadlock handle assembly, so door thickness is not the governing dimension; compatibility is determined by the 4550 MS Deadlock platform it is engineered for.
7) Is this spring rated for commercial storefront use or is it a residential part?
Commercial. The 28-0019-MP is catalogued as commercial door hardware and is used in offices, retail storefronts and glazed entrances, schools, healthcare, warehouses, and municipal buildings that run 4550 MS deadlocks on their perimeter doors.
8) How many springs come with the 28-0019-MP order?
The 28-0019-MP is sold as a single part number with no size, finish, or length choices to make, so there is one configuration to order. If you maintain several 4550 MS deadlocks across a property, order one per lock you plan to service.
How fast can I get the Adams Rite 28-0019-MP 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 Adams Rite 28-0019-MP come with a warranty?
Absolutely. The Adams Rite 28-0019-MP 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 Adams Rite 28-0019-MP?
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 Adams Rite 28-0019-MP 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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