Alarm Lock HW903DBL DL3500DBL ...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$297.09
$240.88
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Alarm Lock HW903DBL DL3500DBL Deadbolt Lock Case Replacement Part, Left Hand

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Model: HW903DBL

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

$297.09
$240.88
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Alarm Lock HW903DBL DL3500DBL Deadbolt Lock Case Replacement Part, Left Hand

The Alarm Lock HW903DBL is a factory-replacement deadbolt lock case (Dbolt Lock Only) designed specifically for the DL3500DBL series, configured for left-hand door applications. Engineered as a commercial-grade replacement component, this lock case is intended to restore or maintain the full operational integrity of compatible Alarm Lock DL3500DBL installations. Designed for commercial environments where reliable access control hardware is essential, this part integrates directly with the existing DL3500DBL platform without the need for full-unit replacement.

Key Features

  • Model-Specific Compatibility: Designed exclusively for the Alarm Lock DL3500DBL series, ensuring a precise fit and seamless integration with existing hardware.
  • Left-Hand Configuration: Factory-specified for left-hand door applications, eliminating guesswork during replacement and ensuring correct mechanical operation.
  • Direct Replacement Component: Serves as a genuine Alarm Lock replacement lock case (Dbolt Lock Only), restoring full deadbolt functionality without requiring complete unit replacement.
  • Commercial-Grade Construction: Built to the same standards as the original DL3500DBL hardware, suitable for demanding commercial access control applications.
  • Lock Case Assembly: Supplies the core deadbolt mechanism (lock case only), making it ideal for service technicians and facility maintenance teams performing targeted component-level repairs.
  • Genuine OEM Part: Sourced as an Alarm Lock factory part and accessory, maintaining system integrity and reliability for installed DL3500DBL units.

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: Lock Cases
  • Parts and Accessories Type: Replacement Parts
  • Commercial/Residential: Commercial
  • Product Model: HW903DBL
  • Features: Alarm Lock Parts and Accessories

Typical Applications

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

Why Alarm Lock HW903DBL?

Alarm Lock is a recognized name in commercial access control and door security hardware, and the HW903DBL replacement lock case reflects that commitment to precision engineering. As a genuine factory component for the DL3500DBL series, this left-hand deadbolt case delivers reliable performance that matches the original specification, making it the trusted choice for service professionals and facility managers who need a dependable, drop-in solution for component-level maintenance and repair.

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:
Lock Cases
Parts and Accessories Type:
Replacement Parts
Commercial/Residential:
Commercial
Product Model:
HW903DBL
Features:
Alarm Lock Parts and Accessories

Alarm Lock HW903DBL – Frequently Asked Questions

1) Will the Alarm Lock HW903DBL fit a right-hand door?
No. The HW903DBL is the left-hand version of the DL3500DBL deadbolt lock case. Handing is factory-set on this part, so a right-hand opening needs the right-hand case instead. Check the swing of the door the DL3500DBL is mounted on before you order, because the deadbolt mechanism will not operate correctly in the wrong hand.
2) What exactly comes with the HW903DBL, and do I get the keypad or trim too?
You get the deadbolt lock case only (Dbolt Lock Only), which is the core deadbolt mechanism for a DL3500DBL. No keypad, housing, trim, or strike is part of it. If the electronics or the exterior housing on your DL3500DBL are the problem, this part will not solve it.
3) Can I use the HW903DBL lock case on a DL2700 or another Trilogy model?
No. This deadbolt case is built specifically for the DL3500DBL series. Other Alarm Lock Trilogy models use different cases, so confirm the unit on the door is a DL3500DBL before ordering this part.
4) Is the HW903DBL a genuine Alarm Lock part or an aftermarket copy?
It is a factory Alarm Lock component, supplied as the OEM replacement lock case for the DL3500DBL series. For facilities standardizing on Alarm Lock hardware, that keeps the repaired unit on original spec rather than mixing in a third-party mechanism.
5) Do I have to replace the whole DL3500DBL lock if the deadbolt mechanism fails?
Not if the failure is in the deadbolt case itself. The HW903DBL swaps in at the component level, so a technician can restore deadbolt operation without pulling and reprogramming a complete unit. That is the usual call for maintenance teams keeping a set of DL3500DBL openings in service.
6) Is this deadbolt case rated for commercial traffic, or is it a residential part?
Commercial. The HW903DBL is built to the same standard as the original DL3500DBL hardware and is intended for commercial access control openings: offices, schools, healthcare, retail, warehouses, multi-tenant residential, and government buildings.
How fast can I get the Alarm Lock HW903DBL 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 Alarm Lock HW903DBL come with a warranty?
Absolutely. The Alarm Lock HW903DBL 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 Alarm Lock HW903DBL?
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 Alarm Lock HW903DBL 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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