Corbin Russwin 436F17-8 Grade ...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$10.71
Corbin Russwin 436F17-8 Grade 1 ML2000 Retaining Ring

Corbin Russwin 436F17-8 Grade 1 ML2000 Retaining Ring

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Model: 236F17-8

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

$10.71
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Corbin Russwin 2436F17-8 ML2000 Series Mortise Lock Retaining Ring Replacement Part

Genuine Replacement Component for the ML2000 Series Heavy-Duty Mortise Lock

The Corbin Russwin 2436F17-8 is a genuine replacement retaining ring designed specifically for the heavy-duty Corbin Russwin ML2000 Series mortise lock. This precision-engineered component is used to secure the internal components of the ML2000 mortise lockset, ensuring continued reliable operation of the locking mechanism. Sourced directly from Corbin Russwin, this retaining ring is the correct replacement part for maintaining the integrity and performance of your ML2000 Series mortise lock installation.

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 lock parts and accessories are manufactured to the exacting standards of the ML2000 Series heavy-duty mortise lock platform, delivering reliable performance in commercial door hardware applications. This genuine replacement retaining ring ensures that your ML2000 Series mortise lockset continues to operate as originally designed, securing internal components with precision. For demanding commercial environments where dependable hardware performance is essential, Corbin Russwin replacement parts provide the confidence of authentic manufacturer quality.

Product Specs

Product Group:
Lock Parts and Accessories
Product Subgroup:
Parts and Accessories
Product Type:
Rings, Spindles and Springs
Commercial/Residential:
Commercial
Subcategory:
Parts and Accessories
Product Function:
Retaining Ring
For Use With:
ML2000 Mortise Lock
Department:
Door Hardware

Corbin Russwin 236F17-8 – Frequently Asked Questions

1) What exactly is the Corbin Russwin 436F17-8 part, and what does it do inside the lock?
It's a retaining ring, a small internal component that holds the working parts of a Corbin Russwin ML2000 Series heavy-duty mortise lockset in place. It is not a lock, a trim piece, or a cylinder ring you see on the door face. Buy it when you're rebuilding or servicing an ML2000 lockbody and the original ring is lost, bent, or worn.
2) Will the 436F17-8 retaining ring fit a Corbin Russwin ML2000 mortise lock?
Yes. The 436F17-8 is specified for the ML2000 Series mortise lock and is the factory replacement part for that platform. It is not intended for other Corbin Russwin lines or for another manufacturer's mortise case.
3) What ML2000 specs should I confirm before ordering service parts for an existing opening?
Check the case against the standard ML2000 numbers so you know you're working on the right lock: 2-3/4 inch backset, 1-3/4 inch door thickness standard, 3/4 inch (19mm) throw two-piece anti-friction latchbolt, 9/16 inch auxiliary latchbolt throw, and a 1 inch throw stainless deadbolt. Center to center is 3-5/8 inches knob or lever to cylinder and 2-7/16 inches knob or lever to thumbturn. If those match, it's an ML2000 and the 436F17-8 ring applies.
4) Can I use this retaining ring to repair a mortise lock instead of replacing the whole lockset?
That's the point of it. If the lockbody itself is sound, swapping the retaining ring restores the internal assembly without pulling a new ML2000 lockset off the shelf. A worn ring is a component-level repair on a heavy-gauge steel case measuring 5-7/8 x 4 x 15/16 inches, so the case usually outlives the small parts inside it.
5) My ML2000 is on a 3-hour fire door. Does using a replacement retaining ring affect the fire rating?
Use genuine Corbin Russwin parts and the lock stays as originally listed. The ML2000 is UL/cUL listed to UL10C positive pressure for 3-hour fire doors up to 4' x 10' single or 8' x 10' pair. Substituting a generic ring into a listed lock is what puts that listing at risk, which is the reason to order the factory 436F17-8.
6) I'm re-handing an ML2000 mortise lock. Do I need to open the case and replace internal parts like this ring?
No. The ML2000 uses a patented Quick Reversible latchbolt, so handing is reversed without disassembling the lock case. You'd only be into the internals, and into a retaining ring, for an actual repair or rebuild.
7) Is this part suitable for commercial buildings, or is it a residential-grade item?
Commercial. It serves the ML2000 mortise lock platform, which is rated ANSI/BHMA A156.13 Series 1000, Operational and Security Grade 1. That's the family used in offices, schools, healthcare, retail, and multi-tenant residential openings.
8) How many of these retaining rings do I need, and is this a single part or a kit?
The 436F17-8 is offered as a single retaining ring model, one configuration only, with no size or finish choices to pick. Order the quantity your rebuild calls for.
How fast can I get the Corbin Russwin 236F17-8 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 236F17-8 come with a warranty?
Absolutely. The Corbin Russwin 236F17-8 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 236F17-8?
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 236F17-8 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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