Corbin Russwin 404F85-8 Grade ...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$9.79
Corbin Russwin 404F85-8 ML2000 Lever Return Spring

Corbin Russwin 404F85-8 Grade 1 ML2000 Lever Return Spring

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Model: 404F85-8

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

$9.79
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Corbin Russwin 404F85-8 Lever Return Spring for ML2000 Mortise Lock

Genuine Replacement Lever Return Spring for ML2000 Series Mortise Locksets

The Corbin Russwin 404F85-8 is a genuine OEM Lever Return Spring designed specifically for use with the ML2000 Mortise Lock series. This precision-engineered replacement component restores proper lever return function, ensuring smooth and reliable operation of the mortise lockset. Sourced directly from Corbin Russwin, this part is the correct factory-specified solution for maintaining the performance and integrity of ML2000 Series hardware in commercial door applications.

Professional Features & Benefits

  • ANSI/BHMA Grade 1 mortise lock per A156.13 Series 1000, Operational and Security Grade 1
  • UL Cycle above and beyond: 14.5 Million Cycles (Verification ID: V875753)
  • Patented Quick Reversible latchbolt — reverse handing without disassembling the lock case
  • Multi-function capability: 12 functions configurable from one ML2054 lockbody
  • Heavy-gauge steel lockcase 5-7/8" x 4" x 15/16"; 1" stainless steel deadbolt, 1" throw
  • 3/4" (19mm) throw anti-friction two-piece latchbolt requires less force to close
  • Wide variety of trim designs including Muséo®, Vineyard™, Behavioral Health (BHSS/BLSS)
  • Status indicator options for locked/unlocked visibility (sectional and escutcheon trim)
  • Motorized Electric Latch Retraction (MELR) available for ML20900 series
  • Thru-bolted trim designs for proper alignment and increased security
  • Can be used with new or existing Corbin Russwin key systems; accepts most other manufacturers' cylinders
  • UL/cUL listed, UL10C positive pressure; 3-hour fire door up to 4' x 10' single or 8' x 10' pair
  • Ten-year mechanical warranty; five-year MELR; two-year electrical

Technical Specifications

  • Grade: ANSI/BHMA A156.13 Series 1000, Operational and Security Grade 1
  • Handing: Handed; quick reversible — re-handed without disassembling the lock case
  • Door Thickness: 1-3/4" (44mm) standard; optional thicknesses available
  • Backset: 2-3/4" (70mm)
  • Lockcase: Heavy-gauge steel, 5-7/8" (149mm) x 4" (102mm) x 15/16" (24mm)
  • Armored Front: Wrought brass, bronze, or stainless steel, 8" x 1-1/4"
  • Latchbolt: 2-piece mechanical with anti-friction insert, 5/8" x 1" x 3/4" (19mm) throw
  • Auxiliary Latchbolt: 9/16" (14mm) effective throw; deadlocking
  • Deadbolt: One-piece stainless steel, 19/32" x 1-1/4" x 1" (25mm) throw
  • Strike: Wrought brass, bronze, or stainless steel, ANSI straight lip, 4-7/8" x 1-1/4" x 1-1/8" lip to center
  • Cylinder: Brass, 6-pin L4 keyway, 0-bitted standard
  • Spacing: C. to c. knob/lever to cylinder: 3-5/8" (92mm); knob/lever to thumbturn: 2-7/16" (62mm)
  • Certifications: ANSI/BHMA A156.13 Grade 1; UL/cUL UL10C 3-hour positive pressure; ADA A117.1; California State Fire Marshal; Windstorm/Hurricane certified
  • Warranty: Ten-year mechanical; five-year MELR; two-year electrical

Professional Applications

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

Why Choose Corbin Russwin Quality?

Corbin Russwin door hardware components are manufactured to commercial-grade standards, delivering reliable performance in demanding, high-traffic environments. The 404F85-8 Lever Return Spring is a genuine factory part, ensuring that ML2000 Mortise Lock assemblies continue to operate as originally designed. For facility managers, locksmiths, and contractors, using authentic Corbin Russwin replacement parts is the trusted approach to maintaining long-term lockset performance and serviceability.

Product Specs

Product Group:
Lock Parts and Accessories
Product Subgroup:
Parts and Accessories
Product Type:
Lever Return Spring
Commercial/Residential:
Commercial
Subcategory:
Parts and Accessories
For Use With:
ML2000 Mortise Lock
Product Category:
Mechanical Locks
Product Function:
Lever Return Spring
Department:
Door Hardware

Corbin Russwin 404F85-8 – Frequently Asked Questions

1) What does the Corbin Russwin 404F85-8 spring actually do inside the lock?
The 404F85-8 is the lever return spring for Corbin Russwin ML2000 Series mortise locks. It's the part that brings the lever back to horizontal after someone lets go. When levers start drooping or hang low after use, that's the return spring, not the lock case, and this is the factory part that restores it.
2) My Corbin Russwin lever is sagging - do I need a whole new mortise lock?
Usually not. A sagging or drooping lever on an ML2000 mortise lock is almost always the return spring giving up, and the 404F85-8 replaces just that component rather than the lockbody. The heavy-gauge steel lockcase, latchbolt and deadbolt stay in the door, so you keep the existing keying and prep and only service the trim side.
3) Will the 404F85-8 fit any Corbin Russwin mortise lock, or only certain ones?
It's specified for the ML2000 Series mortise lockset. Corbin Russwin has other mortise families and other lever trim, and return springs are not interchangeable across them, so confirm the lock in the door is an ML2000 before ordering this one.
4) Is this a genuine Corbin Russwin part or aftermarket?
Genuine OEM. The 404F85-8 is the factory-specified return spring for ML2000 trim, which matters on locks carrying an ANSI/BHMA A156.13 Series 1000 Grade 1 rating and a UL10C fire listing, where substituting non-factory internals can put the listed assembly in question.
5) Is the lever return spring handed - do I need to know if the door is left or right hand?
The ML2000 lockset itself is handed, though it uses a quick reversible latchbolt that re-hands without opening the lock case. The 404F85-8 is a trim-side return spring, so the handing decision lives with the lockbody and the lever, not with this part.
6) Do I need to pull the mortise lock out of the door to replace the spring?
The return spring sits in the lever trim, not in the lock case, so the work is on the face of the door. The ML2000 uses thru-bolted trim designs, so plan on removing the thru-bolts and the trim to reach it. The 5-7/8 x 4 x 15/16 inch lockcase can stay mortised in place.
7) I'm standardizing lever repairs across a building of Corbin Russwin locks - is this the part to stock?
If the openings are ML2000 mortise locksets with lever trim, the 404F85-8 is the return spring to keep on the shelf. ML2000 trim spans several designs including Museo, Vineyard and the Behavioral Health BHSS/BLSS lines, so verify the trim family on your doors before buying a case quantity.
8) Is the 404F85-8 suitable for high-traffic commercial openings?
It's a commercial door hardware component for the ML2000 platform, which is UL cycle verified to 14.5 million cycles. Schools, hospitals, offices and multi-tenant residential are the typical settings, and lever return springs are a normal wear item on those openings.
How fast can I get the Corbin Russwin 404F85-8 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 Corbin Russwin 404F85-8 come with a warranty?
Absolutely. The Corbin Russwin 404F85-8 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 Corbin Russwin 404F85-8?
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 Corbin Russwin 404F85-8 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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