Corbin Russwin 681F31 Grade 1 ...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$58.99
$23.82
Corbin Russwin 681F31 - ML2000 Armored Front for LatchBolt, latch, aux latch, toggle, Standard 1-1/4" width

Corbin Russwin 681F31 Grade 1 - ML2000 Armored Front for LatchBolt, latch, aux latch, toggle, Standard 1-1/4" width

(No reviews yet) Write a Review

Model: 681F31-626
Selected Finish is

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

$58.99
$23.82
Adding to cart… The item has been added
Free Shipping on orders over $199
We price match and offer bulk discounts! Click Add to Quote. It's quick and easy.
✨
Earn points with this purchase! You can redeem points for giftcards, iPads, XBox's and more. View Rewards
Free Keying on all locks
You may also like

Corbin Russwin 681F31 ML2000 Series Armored Front for Mortise Lock with Latchbolt, Auxiliary Latch, and Toggle 1-1/4" Standard Width

Commercial-Grade Mortise Lock Replacement Part for ML2000 Series Applications

The Corbin Russwin 681F31 is a standard armored front designed specifically for use with the ML2000 Mortise Lock Series. This precision-engineered lock part accommodates the latchbolt, auxiliary latch, and toggle functions, making it a reliable replacement or upgrade component for commercial mortise lock installations. Featuring a standard 1-1/4" width, this armored front is built to integrate seamlessly with compatible ML2000 mortise lock bodies in demanding commercial environments.

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 mechanical lock parts are engineered to commercial-grade standards, delivering consistent performance and precise fit within the ML2000 Mortise Lock Series. The 681F31 armored front is purpose-built to support latchbolt, auxiliary latch, and toggle functions at the standard 1-1/4" width, ensuring reliable operation in high-demand commercial door hardware applications. Trust Corbin Russwin components to maintain the integrity and performance of your mortise lock installation.

Product Specs

Product Group:
Parts and Accessories
Product Subgroup:
Parts and Accessories
Product Type:
Armored Front
Commercial/Residential:
Commercial
Subcategory:
Parts and Accessories
Product Attribute:
Parts and Accessories
Product Model:
681F31
Product Category:
Mechanical Locks
Product Width:
1-1/4"
Department:
Door Hardware
Latchbolt Type Specification:
Springlatch

Corbin Russwin 681F31-626 – Frequently Asked Questions

1) What exactly is the Corbin Russwin 681F31, and what part of the lock does it replace?
The 681F31 is the armored front faceplate for Corbin Russwin ML2000 Series mortise locks, the plate that shows on the edge of the door and covers the lock case. This version is cut for a latchbolt, auxiliary latch and toggle, at the standard 1-1/4 inch width. It is a replacement face for an existing ML2000 lock body, not a complete lockset, so the lock case, trim, cylinder and strike are separate items.
2) Will a 1-1/4 inch armored front fit my mortise lock, or do I need the 1-1/8 inch size?
Measure the face of the lock currently in the door before ordering. The 681F31 is the 1-1/4 inch standard width front, sized to the ML2000 case, and the matching ANSI straight lip strike is also 1-1/4 inch wide. If your existing front measures narrower than that, the 681F31 will overhang the door edge prep and you need the narrower front for that case instead.
3) Does the armored front need to be handed, and do I have to pull the lock apart to re-hand it?
The ML2000 lock is handed, but it uses a patented quick reversible latchbolt so the hand can be changed without disassembling the lock case. That means swapping the front and flipping the latch is a door-edge job rather than a bench rebuild. Fit the front so the latch bevel faces the stop side of the frame.
4) Will this front work on a lock that also has a deadbolt?
No. The 681F31 is cut for latchbolt, auxiliary latch and toggle only. If your ML2000 function includes the 1 inch throw stainless deadbolt, you need the armored front cut with the deadbolt opening. Check the face of the lock you are replacing: if there are three openings including a rectangular bolt cutout, this is not the right front.
5) Can I replace the armored front on a fire-rated door without affecting the label?
The ML2000 mortise lock is UL/cUL listed to UL10C positive pressure and carries a 3-hour rating on single doors up to 4 by 10 feet and pairs up to 8 by 10 feet. Using the correct Corbin Russwin armored front keeps the assembly as listed; substituting a generic faceplate does not. Order the front that matches the bolt configuration of the lock in the door.
6) I have a Corbin Russwin ML2054 in the door but I am not sure which armored front it takes. How do I tell?
Go by the bolts, not the lock number. One ML2054 body covers 12 configurable functions, so the same case can be fronted differently. Pull the front off and look at the cutouts: latchbolt plus auxiliary latch plus toggle only means the 681F31 at 1-1/4 inch width. Any deadbolt opening means a different front.
7) What size is the armored front plate on the Corbin Russwin ML2000 mortise lock?
The armored front measures 8 inches by 1-1/4 inches, and it is supplied in wrought brass, bronze, or stainless steel depending on finish. It covers an ML2000 lock case measuring 5-7/8 by 4 by 15/16 inches.
8) What finishes does the Corbin Russwin 681F31 armored front come in?
Ten finishes: 605 bright brass, 606 satin brass, 612 satin bronze, 613E dark oxidized satin bronze equivalent, 619 satin nickel, 625 bright chrome, 626 satin chrome, 629 bright stainless, 630 satin stainless, and BSP black suede powder coat. For a fleet of openings, 626 satin chrome and 630 satin stainless are the two commercial standards, so match the front to the trim already on the doors rather than to the strike.
9) What latch does this armored front cover, and will the existing strike still catch?
It fronts the ML2000 two-piece mechanical latchbolt with anti-friction insert, 5/8 x 1 inch with a 3/4 inch (19mm) throw, plus a deadlocking auxiliary latch at 9/16 inch (14mm) effective throw. Replacing the front alone does not change latch projection, so an ANSI straight lip strike already set for that 3/4 inch throw stays as is.
10) What door thickness and backset does the ML2000 lock this front belongs to use?
Standard prep is a 1-3/4 inch (44mm) door with a 2-3/4 inch (70mm) backset, which is the usual commercial mortise setup. Other door thicknesses are available as an option on the lock. Center to center spacing is 3-5/8 inches (92mm) knob or lever to cylinder and 2-7/16 inches (62mm) knob or lever to thumbturn, which matters if you are also replacing trim.
11) Is the ML2000 mortise lock this front fits Grade 1, and how many cycles is it rated for?
ANSI/BHMA A156.13 Series 1000, Operational and Security Grade 1, with UL cycle testing at 14.5 million cycles (Verification ID V875753). It also meets ADA A117.1 and carries California State Fire Marshal and windstorm/hurricane certification. That is the spec line institutional buyers standardizing a building normally need.
How fast can I get the Corbin Russwin 681F31-626 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 681F31-626 come with a warranty?
Absolutely. The Corbin Russwin 681F31-626 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 681F31-626?
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 681F31-626 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.
!