Corbin Russwin 439F34 Grade 1 ...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$14.95
Corbin Russwin 439F34 R Series Escutcheon Thru Bolt Screws

Corbin Russwin 439F34 Grade 1 R Series Escutcheon Thru Bolt Screws

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Model: 439F34-626
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$14.95
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Corbin Russwin 439F34 R Series Escutcheon Thru Bolt Screws for ML2000 Mortise Lock

Genuine Replacement Fastener Components for Commercial Mortise Lock Escutcheons

The Corbin Russwin 439F34 R Series Escutcheon Thru Bolt Screws are genuine manufacturer replacement fastener components designed specifically for use with the ML2000 Mortise Lock and its "R" Series Escutcheon. These commercial-grade screws ensure a secure, properly fastened escutcheon assembly, maintaining the integrity and performance of the ML2000 mortise lock installation. Sourced directly from Corbin Russwin, these parts deliver the fit and quality expected from a trusted commercial hardware manufacturer.

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
  • Government and Municipal Buildings
  • Multi-Tenant Residential Properties
  • Industrial and Warehouse Facilities
  • Retail Establishments

Why Choose Corbin Russwin Quality?

Corbin Russwin has been a recognized name in high-quality commercial grade hardware serving commercial and institutional facilities. Their product line includes ANSI/BHMA Grade 1 mortise locks, cylindrical locks, exit devices, door control, high security key systems, and electromechanical and access control hardware. The 439F34 Thru Bolt Screws reflect that same commitment to precision manufacturing, ensuring that every component of your ML2000 mortise lock installation performs as intended in demanding professional environments.

Product Specs

Product Group:
Parts and Accessories
Product Subgroup:
Parts and Accessories
Product Type:
Lock Parts and Accessories
Commercial/Residential:
Commercial
Subcategory:
Parts and Accessories
Product Function:
Screw
For Use With:
ML2000 Mortise Lock; "R" Escutcheon
Department:
Door Hardware

Corbin Russwin 439F34-626 – Frequently Asked Questions

1) What does the Corbin Russwin 439F34 thru bolt screw set actually fasten?
The 439F34 is the thru bolt screw set for the "R" Series escutcheon on the Corbin Russwin ML2000 mortise lock. It is the fastener hardware only, not the escutcheon plate and not the lock body. Thru bolting is how the ML2000 escutcheon trim is pulled tight through the door from both sides, so if you have stripped, lost, or mismatched screws holding an R escutcheon, this is the part that puts the trim back on properly.
2) Will the 439F34 thru bolt screws work on a 1-3/8 inch door or a thick door?
These screws are sized for the 1-3/4 inch door thickness, which is the standard ML2000 setup and the standard commercial door. Thru bolt screws are cut to a specific door thickness, so on a thinner 1-3/8 inch leaf or a door built thicker than standard you need the screw set matched to that thickness rather than this one. Measure the leaf before you order, not the old screw, since old screws get swapped over the life of a door.
3) I have a sectional trim ML2000, not an escutcheon. Are these the right screws?
No. The 439F34 set is specific to the "R" Series escutcheon, the full-length plate trim. Sectional trim mounts on separate rose and lever pieces and uses its own fasteners, so these will not be the correct length or head style for it. Check whether your door has one long plate running the height of the lock (escutcheon) or separate round roses at the lever and cylinder (sectional) before ordering.
4) Can I just use hardware store machine screws instead of the Corbin Russwin thru bolt screws?
Thru bolt screws on a mortise escutcheon are cut to the door thickness and threaded to mate with the trim posts on the opposite side, so a generic machine screw either bottoms out or leaves the plate loose. Loose escutcheon trim on a mortise lock puts side load on the lever hub and works the plate against the door face every cycle. The 439F34 is the OEM fastener for the R escutcheon on the ML2000 and is the part to match.
5) Does replacing the escutcheon screws affect the fire rating on a labeled ML2000 opening?
The ML2000 mortise lock is UL/cUL listed and UL10C positive pressure rated for 3 hour fire doors up to 4 by 10 feet single and 8 by 10 feet pair. Keeping that rating intact depends on the opening being assembled with the manufacturer's own components, which is why on a labeled door you replace escutcheon thru bolts with the OEM 439F34 set rather than substituting field fasteners. This matters most on institutional and healthcare corridors where the doors are inspected.
6) Is the 439F34 screw set a commercial part or will it fit residential Corbin Russwin hardware?
Commercial. These screws belong to the ML2000 mortise lock platform, an ANSI/BHMA A156.13 Series 1000 Grade 1 lock used in offices, schools, healthcare, government buildings and multi-tenant residential. If the door you are working on has a tubular or cylindrical lockset rather than a mortise case pocketed into the edge of the door, this is not the fastener you need.
How fast can I get the Corbin Russwin 439F34-626 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 439F34-626 come with a warranty?
Absolutely. The Corbin Russwin 439F34-626 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 439F34-626?
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 439F34-626 from ZenSupply?
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