Hager 3947 Standard Spring Lat...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$39.99
$34.66

Hager 3947 Standard Spring Latch with 2-3/4" Backset and Square Corner Faceplate

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Model: 3947 US10B
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$39.99
$34.66
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Hager 3947 Standard Spring Latch with 2-3/4" Backset and Square Corner Faceplate

Professional Passage Spring Latch Solution

The Hager 3947 Standard Spring Latch delivers reliable passage function for commercial door applications with a 2-3/4" (70mm) backset configuration. This brass construction spring latch features a 1-1/8" x 2-1/4" (29mm x 57mm) square corner faceplate and is designed for compatibility with 2500/3500/3700 Series hardware. Available in multiple finish options including US3, US4, US10B, US26, US26D and BLK to match existing door hardware.

Professional Features & Benefits

  • Standard Backset Configuration: 2-3/4" (70mm) backset provides compatibility with most commercial door preparations and standard lockset installations.
  • Precision Faceplate Dimensions: 1-1/8" x 2-1/4" (29mm x 57mm) square corner faceplate ensures proper fit and professional appearance in door edge mortises.
  • Brass Construction: Durable brass substrate provides long-lasting performance and corrosion resistance for commercial applications.
  • Series Compatibility: Designed specifically for use with Hager 2500/3500/3700 Series hardware systems for seamless integration.
  • Multiple Finish Options: Available in US3, US4, US10B, US26, US26D and BLK finishes to coordinate with existing door hardware and architectural specifications.
  • Passage Function: Spring latch mechanism provides smooth retraction and extension for reliable door operation without locking capability.
  • Square and Round Corner Options: Faceplate available in both square and round corner configurations to match door preparation requirements.

Technical Specifications

  • Commercial/Residential: Commercial
  • Faceplate: 1-1/8" x 2-1/4"
  • Faceplate Type: Square and round corner available
  • Finishes: US3, US4, US10B, US26, US26Dand BLK
  • Notes: 1-1/8" x 2-1/4" (29mm x 57mm) Faceplate
  • Subcategory: Door Latches and Catches

Installation & Operation

  1. Review manufacturer specifications and verify door preparation requirements including door thickness, stile width, and handing as applicable to this product.
  2. Use manufacturer-provided templates to mark mounting hole locations accurately on door and/or frame surfaces.
  3. Prepare door and frame by drilling required holes and routing as specified in manufacturer instructions.
  4. Install all mounting hardware and secure the device to door and frame per manufacturer torque specifications.
  5. Adjust operational components for proper alignment, latching, and smooth operation throughout the full range of motion.
  6. Test device operation to verify proper function and make final adjustments as needed. Refer to manufacturer documentation for complete installation details and troubleshooting.

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 Hager Quality?

Hager spring latch products deliver professional-grade reliability with brass construction engineered for demanding commercial applications. The precision-manufactured 2-3/4" backset and standardized faceplate dimensions ensure consistent performance and easy integration with existing Hager hardware systems. Designed for dependable passage function where reliable door operation is essential.

Manufacturer Resources

Product Specs

Subcategory:
Door Latches and Catches
Product Group:
Door Trim and Accessories
Product Subgroup:
Door Latches and Catches
Product Type:
Spring Latch
Commercial/Residential:
Commercial
Product Model:
3947
Product Function:
Passage
Face Plate:
1-1/8" x 2-1/4"
Product Substrate:
Brass
Product Category:
Door Trim and Accessories
Department:
Door Hardware

Hager 3947 US10B – Frequently Asked Questions

1) Will the Hager 3947 spring latch work in a door bored for a 2-3/4 inch backset?
That's exactly what the 3947 is cut for. It's a 2-3/4 inch backset latch, which is the deeper of the two standard commercial backsets (2-3/8 is the other). Measure from the door edge to the center of the knob or lever bore: if that's 2-3/4 inches, this latch drops into the existing bore. If your door measures 2-3/8, this one will not reach and you need a 2-3/8 inch latch instead.
2) What size faceplate mortise does the Hager 3947 latch need in the door edge?
The faceplate measures 1-1/8 x 2-1/4 inches (29mm x 57mm), so the edge mortise has to match that footprint. If the door is already routed for a latch of those dimensions, the 3947 sits flush with no rework. A larger existing mortise will leave a gap around the plate.
3) Do I have to choose square corner or round corner on the Hager 3947 latch?
Yes, corner style is a required choice at order time, square corner or round corner. Look at the routing in the door edge: a router-cut mortise usually has radiused corners and takes the round corner plate, while a chiseled or factory square prep takes the square corner. Pick the one that matches the prep you already have, since the plate has to seat in it.
4) Is the Hager 3947 a locking latch or just a passage latch?
Passage only. The spring latch retracts and extends to hold the door closed, with no locking function of its own, so it suits corridor, office and closet doors that never need to be secured. For a locking opening you need a latch matched to a keyed or privacy lockset, not this one.
5) What's the alternative if my door is prepped for a 2-3/8 inch backset instead of 2-3/4?
You need a shorter-backset springlatch. The Falcon A57420-000 B Series springlatch is a 2-3/8 inch unit with a 1 inch face, which covers the shallower prep common on residential-depth and some narrow openings. The Hager 3947 at 2-3/4 inches cannot be shortened to fit that bore.
6) What finishes does the Hager 3947 spring latch come in?
Four orderable finishes: 605 bright brass, 613 satin bronze oil-rubbed, 626 satin chrome, and black. In practice you match the latch face to the lockset trim already on the door, since the faceplate is the only part that shows once the door is closed. 626 satin chrome is the usual match for commercial 626 lever sets.
7) Is a brass spring latch durable enough for a high traffic commercial door?
The 3947 is a brass latch rated by the manufacturer for commercial rather than residential use, so it's the right class of part for office, school, healthcare and multi-tenant corridors. Brass also holds up better than plated steel in humid or coastal openings.
8) Is there an installation template for the Hager 3947 latch prep?
Hager publishes a product template for the 3947 (T-LS00209), which gives the door edge routing and bore locations. Use it to mark the mortise before cutting, especially if you're converting a door that was prepped for a different latch footprint.
How fast can I get the Hager 3947 US10B 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 Hager 3947 US10B come with a warranty?
Absolutely. The Hager 3947 US10B 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 Hager 3947 US10B?
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 Hager 3947 US10B 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.