Ives FB51 Constant Latching Fl...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$305.60
$142.29
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Ives FB51 Constant Latching Flush Bolts for Metal Doors with 12" Rod Length

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Model: FB51P 12 MD US32D
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$305.60
$142.29
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Ives FB51 Constant Latching Flush Bolts for Metal Doors with 12" Rod Length

Professional Constant Latching Solution for Double Door Applications

The Ives FB51 Constant Latching Flush Bolts provide secure anchoring for metal door pairs with innovative constant latching operation. Designed specifically for metal doors, these flush bolts feature a 12" standard rod length measured from the center of the flush bolt body to the bolt tip, with 3/4" bolt throw and 7/8" vertical adjustment capability. The constant latching mechanism ensures the inactive door remains latched until the active door is opened, providing automatic security with low actuation forces and non-handed installation flexibility.

Professional Features & Benefits

  • Constant Latching Operation: Inactive door remains latched until active door is opened, releasing automatic bottom bolt while top bolt can be manually released for enhanced security control.
  • Metal Door Compatibility: Engineered specifically for use with metal doors only, ensuring proper fit and reliable operation in commercial applications.
  • Precision Bolt Specifications: 3/4" bolt throw with 7/8" vertical adjustment and 3/4" bolt backset for versatile installation requirements.
  • Standard Rod Length: 12" rod length measured from center of flush bolt body to bolt tip accommodates standard door configurations.
  • Low Actuation Forces: Designed for smooth operation with minimal effort required for manual bolt release when needed.
  • Non-Handed Design: Universal installation eliminates handing concerns and simplifies inventory management for contractors.
  • Fire Door Compliance: UL Listed for 3-hour fire door applications meeting critical life safety requirements.
  • ANSI/BHMA Certification: Meets ANSI A156.3 Type 27 standards for commercial-grade performance and reliability.

Technical Specifications

  • ANSI/BHMA: ANSI A156.3 Type 27
  • Commercial/Residential: Commercial
  • Department: Door Hardware
  • Door Hand Direction: Non-Handed
  • Door Strike: W: 15/16", L: 2-1/4", D: 1/16"
  • Fire Rating: Yes
  • Product Category: Door Trim and Accessories
  • Product Dimension: W: 1", L: 6-3/4", D: 2"
  • Product Group: Door Trim and Accessories
  • Product Model: FB51P/FB51T
  • Product Subgroup: Flush Bolts
  • Product Type: Flush Bolts
  • Subcategory: Flush Bolts and Coordinators
  • UL Listing Type: UL Listed 3 Hours

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 Ives Quality?

Ives FB51 flush bolts deliver professional-grade reliability with precision-engineered constant latching mechanisms designed for demanding commercial applications. UL Listed for 3-hour fire door applications and certified to ANSI/BHMA A156.3 Type 27 standards, these flush bolts provide dependable security performance where reliable door anchoring is essential. Engineered for demanding commercial applications where dependable performance is essential.

Manufacturer Resources

Ives Full Line Catalog

Product Specs

Subcategory:
Flush Bolts and Coordinators
Product Group:
Door Trim and Accessories
Product Subgroup:
Flush Bolts
Product Type:
Flush Bolts
ANSI/BHMA:
ANSI A156.3 Type 27
Commercial/Residential:
Commercial
UL Listing Type:
UL Listed 3 Hours
Product Model:
FB51P/FB51T
Door Hand Direction:
Non-Handed
Product Dimension:
W: 1", L: 6-3/4", D: 2"
Fire Rating:
Yes
Door Strike:
W: 15/16", L: 2-1/4", D: 1/16"
Product Category:
Door Trim and Accessories
Department:
Door Hardware

Ives FB51P 12 MD US32D – Frequently Asked Questions

1) What is the Ives FB51 top and automatic bottom bolt used for?
The FB51 provides dual-point locking for doors requiring enhanced security. The top bolt operates manually while the bottom bolt engages automatically when the door closes. Common applications include exit doors, stairwell doors, and high-security commercial entrances.
2) What door types and thicknesses work with this bolt system?
The FB51 fits standard commercial doors typically 1-3/4" thick. Compatible with wood, steel, and aluminum doors. Verify door preparation requirements match your door type. Check manufacturer specifications for exact thickness ranges and edge requirements.
3) Can this be installed on left-hand or right-hand doors?
Specify door handing when ordering. The FB51 is handed and must match your door swing direction. Measure door swing from the hinge side to determine correct handing. Non-handed installation will cause operational issues.
4) What finish options are available for the FB51?
Standard finishes include satin chrome, bright brass, and oil-rubbed bronze. Special finishes may be available on request. Choose finish to match existing door hardware for consistent appearance. Verify finish availability before ordering.
5) What is the holding strength of this bolt system?
Ives commercial-grade bolts provide substantial holding force when properly installed. Exact force ratings depend on door preparation and frame conditions. Consult manufacturer specifications for precise load ratings. Professional installation ensures maximum strength.
6) Does this bolt meet building code requirements?
The FB51 is designed for commercial applications but code compliance depends on specific use and local requirements. Egress doors may have special regulations. Verify with local building officials for life safety applications. Some locations restrict automatic locking mechanisms.
7) What parts are included with the FB51 system?
Complete system includes top bolt assembly, automatic bottom bolt, mounting hardware, and strike plates. Installation template provided. Verify all components before installation. Replacement parts available separately through Ives parts program.
8) What door preparation is required for installation?
Requires mortising door edge and boring holes per template. Frame preparation needed for strike plates top and bottom. Use provided template for accurate positioning. Professional installation recommended for proper alignment and operation.
9) How do you adjust the automatic bottom bolt?
Bottom bolt timing adjusts via internal mechanism. Spring tension controls engagement speed. Follow manufacturer adjustment procedures. Over-adjustment can cause premature wear. Test operation after any adjustments to ensure proper function.
10) Are there similar Ives models for different applications?
Ives offers various bolt configurations including manual-only versions and different throw lengths. The FB series includes multiple models for specific door types. Browse our complete Ives hardware selection for alternative solutions.
11) What maintenance does this bolt system require?
Periodic lubrication of moving parts maintains smooth operation. Clean bolt channels of debris. Check strike alignment if binding occurs. Inspect mounting screws for looseness. Schedule regular maintenance in high-use applications to prevent operational issues.
12) How do you measure for proper bolt extension?
Measure door-to-frame gap and frame depth to determine required throw length. Standard residential gaps differ from commercial applications. Account for weather stripping and door sag. Insufficient throw reduces security while excessive throw causes binding.
How fast can I get the Ives FB51P 12 MD US32D 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 Ives FB51P 12 MD US32D come with a warranty?
Absolutely. The Ives FB51P 12 MD US32D 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 Ives FB51P 12 MD US32D?
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 Ives FB51P 12 MD US32D 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.

Product Reviews

  • 5
    Keeping It Secure: My Thoughts on the Ives FB51 Bolt

    Posted by Chase on Aug 22nd 2023

    I recently got my hands on the Ives FB51 Top and Automatic Bottom Bolt from zensupply.com, and it's doing its job well. The automatic feature is a lifesaver for busy days when I forget to lock up properly. Plus, the installation was a breeze, even for a not-so-handy person like me. However, it's a bit more visible on the door than I'd like. All in all, a solid addition to my security setup.

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