Ives FB31 Automatic Flush Bolt...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$323.20
$172.66
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Ives FB31 Automatic Flush Bolts for Metal Doors with 3/4" Bolt Throw

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Model: FB31P 12 MD US3
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$323.20
$172.66
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Ives FB31 Automatic Flush Bolts for Metal Doors with 3/4" Bolt Throw

Professional Automatic Flush Bolt Solution for Double Door Applications

The Ives FB31 automatic flush bolts provide fully automatic operation for metal door applications, featuring a 3/4" bolt throw with 7/8" vertical adjustment and 3/4" bolt backset. This non-handed flush bolt system includes top and bottom bolts (pair) with low actuation forces and no spring tension on the top bolt. Standard rod length measures 12" from the center of the flush bolt body to the bolt tip, designed specifically for use with metal doors only.

Professional Features & Benefits

  • Fully Automatic Operation: Inactive door is automatically latched with bolts extended when active door closes, and unlatched with bolts retracted when active door opens for seamless operation.
  • Precise Bolt Specifications: 3/4" bolt throw with 7/8" vertical adjustment and 3/4" bolt backset provides reliable securing with installation flexibility.
  • Low Actuation Forces: Top bolt features no spring tension design for easy operation and reduced wear on door hardware.
  • Standard Rod Configuration: 12" standard rod length measured from center of flush bolt body to bolt tip accommodates typical metal door applications.
  • Non-Handed Design: Universal installation eliminates handing considerations and simplifies inventory management.
  • ANSI/BHMA Compliance: Meets ANSI A156.3 Type 25 standards for commercial door hardware applications.
  • UL Fire Door Listed: Approved for use in fire door applications ensuring code compliance and safety.
  • Quality Construction: Available in brass or stainless steel substrate materials for durability and corrosion resistance.

Technical Specifications

  • ANSI/BHMA: ANSI A156.3 Type 25
  • Commercial/Residential: Commercial
  • Department: Door Hardware
  • Door Hand Direction: Non-Handed
  • Product Category: Door Trim and Accessories
  • Product Dimension: W: 1", L: 6-3/4", D: 2"
  • Product Group: Door Trim and Accessories
  • Product Model: FB31
  • Product Subgroup: Flush Bolts
  • Product Substrate: Brass or Stainless Steel
  • Product Type: Flush Bolts
  • Subcategory: Flush Bolts and Coordinators

Installation & Operation

  1. Review manufacturer specifications and verify door preparation requirements including door thickness and edge preparation for flush bolt mortising.
  2. Use manufacturer-provided templates to mark mounting hole locations accurately on door edge and ensure proper alignment with jamb and threshold strike points.
  3. Prepare door edge by routing flush bolt mortise cavities to specified dimensions for both top and bottom bolt assemblies.
  4. Install flush bolt assemblies in prepared mortises and secure mounting hardware per manufacturer torque specifications.
  5. Adjust bolt alignment and vertical positioning using the 7/8" adjustment range to ensure proper engagement with jamb and threshold strikes.
  6. Test automatic operation by closing and opening the active door to verify proper bolt extension and retraction throughout the full cycle. 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 FB31 flush bolts deliver professional-grade reliability with brass or stainless steel construction and ANSI/BHMA A156.3 Type 25 compliance. UL listed for fire door applications and designed with low actuation forces for smooth automatic operation. Engineered for demanding commercial applications where dependable double door security 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 25
Commercial/Residential:
Commercial
Product Model:
FB31
Door Hand Direction:
Non-Handed
Product Dimension:
W: 1", L: 6-3/4", D: 2"
Product Category:
Door Trim and Accessories
Product Substrate:
Brass or Stainless Steel
Department:
Door Hardware

Ives FB31P 12 MD US3 – Frequently Asked Questions

1) What are the Ives FB31 automatic flush bolts used for?
The Ives FB31 automatic flush bolts secure the inactive leaf of double metal doors. They automatically engage when the door closes and retract when the active leaf opens.
2) Are these flush bolts compatible with all metal door types?
The FB31 works with standard hollow metal doors. Verify door thickness and construction before installation. Check manufacturer specifications for compatibility with your specific door frame.
3) How do I determine the correct handing for installation?
Stand facing the outside of the doors. The inactive leaf determines handing. Order right-hand if inactive leaf is on the right, left-hand if on the left.
4) What finishes are available for the FB31 flush bolts?
Standard finishes include US3 bright brass, US4 satin brass, US10B dark bronze, US26D satin chrome, and US32D stainless steel. Custom finishes may be available on request.
5) What is the duty rating for these automatic flush bolts?
The FB31 is designed for heavy-duty commercial applications. Check with manufacturer specifications for specific cycle ratings and load requirements for your installation.
6) Do these flush bolts meet fire door code requirements?
The FB31 can be used on fire-rated assemblies when properly installed. Verify local fire codes and consult fire door labels for approved hardware configurations.
7) What accessories are included with the FB31 flush bolts?
Standard package includes flush bolts, strikes, mounting screws, and installation template. Verify all components are included before beginning installation.
8) What are the basic installation requirements?
Installation requires mortising into the door edge and drilling for strikes. Use manufacturer template for precise measurements. Professional installation recommended for fire-rated doors.
9) How do I adjust the flush bolts after installation?
Adjustment screws allow fine-tuning of bolt projection and spring tension. Make small adjustments and test operation. Lubricate moving parts with light machine oil as needed.
10) Are there similar models available as alternatives?
Other automatic flush bolt options include manual flush bolts or surface-mounted alternatives. Browse our door hardware section for compatible products.
11) What door thickness range do these flush bolts accommodate?
Standard FB31 flush bolts work with most commercial door thicknesses. Verify exact thickness requirements with manufacturer specifications before ordering.
12) What are the key measurements needed for ordering?
Measure door thickness, height, and frame dimensions. Note handing and finish requirements. Confirm clearance for bolt projection into frame head and threshold.
How fast can I get the Ives FB31P 12 MD US3 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 FB31P 12 MD US3 come with a warranty?
Absolutely. The Ives FB31P 12 MD US3 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 FB31P 12 MD US3?
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 FB31P 12 MD US3 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
    A Solid Choice for Security and Convenience!

    Posted by George on Sep 4th 2023

    I got myself the IVES FB31 Automatic Flush Bolts for my metal doors. What I dig about these bad boys is their effortless operation; they secure my doors without a fuss. But, here's the hitch – installation ain't a breeze, needs some elbow grease. Overall, they're pretty swell, though!

  • 5
    Easy Bolt Solution!

    Posted by Oscar on Aug 24th 2023

    The Ives FB31 Automatic Flush Bolts are a game-changer. Smooth automatic action keeps my doors secure without the hassle of manual latching. The metal build is sturdy, but installation can be tricky if you're not familiar with hardware. Say goodbye to door drafts with these bolts!

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