Ives FB61 Constant Latching Fl...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$341.40
$219.80
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Ives FB61 Constant Latching Flush Bolt Set with Automatic Bottom Bolt for Wood Doors

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Model: FB61P WD US4
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$341.40
$219.80
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Ives FB61 Constant Latching Flush Bolt Set with Automatic Bottom Bolt for Wood Doors

Professional Double Door Security Solution

The Ives FB61 constant latching flush bolt system provides reliable security for wood double door applications with innovative automatic operation. This non-handed flush bolt set features constant latching technology where the inactive door remains latched until the active door is opened, releasing the automatic bottom bolt while allowing manual release of the top bolt. Measuring W: 1", L: 8-1/2", D: 2" with brass or stainless steel construction, this UL Listed system meets ANSI A156.3 Type 27 standards for commercial applications.

Professional Features & Benefits

  • Constant Latching Operation: Inactive door remains securely latched until active door is opened, providing automatic security with controlled access sequence.
  • Automatic Bottom Bolt: Bottom bolt retracts automatically when active door opens and extends automatically when door closes for hands-free operation.
  • Low Actuation Forces: Engineered for smooth operation with minimal effort required for manual top bolt release.
  • Non-Handed Design: Universal installation eliminates field determination requirements and reduces inventory needs.
  • Wood Door Compatibility: Specifically designed for wood door applications with appropriate mounting and operational characteristics.
  • Fire-Rated Construction: UL Listed 90 Minutes for fire door applications ensuring code compliance in commercial installations.
  • Professional-Grade Materials: Available in brass or stainless steel construction for durability and corrosion resistance.
  • ANSI/BHMA Compliance: 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: 15/16" x 2-1/4" x 1/16"
  • Fire Rating: Yes
  • Product Category: Door Trim and Accessories
  • Product Dimension: W: 1", L: 8-1/2", D: 2"
  • Product Group: Door Trim and Accessories
  • Product Model: FB61P/FB61T
  • Product Subgroup: Flush Bolts
  • Product Substrate: Brass or Stainless Steel
  • Product Type: Flush Bolts
  • Subcategory: Flush Bolts and Coordinators
  • UL Listing Type: UL Listed 90 Minutes

Installation & Operation

  1. Review manufacturer specifications and verify door preparation requirements including door thickness, stile width, and wood door compatibility for this flush bolt system.
  2. Use manufacturer-provided templates to mark mounting hole locations accurately on door edge and verify clearance for bolt travel into jamb and threshold.
  3. Prepare door by routing recesses for flush bolt housing and drilling required holes per manufacturer specifications for wood door applications.
  4. Install flush bolt assemblies ensuring proper alignment for smooth bolt extension and retraction throughout full travel range.
  5. Adjust operational components for proper constant latching sequence, automatic bottom bolt function, and manual top bolt release operation.
  6. Test complete door operation to verify proper latching sequence, automatic functions, and smooth manual operation. Refer to manufacturer documentation for complete installation details and adjustment procedures.

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 FB61 flush bolt systems deliver professional-grade reliability with brass or stainless steel construction and UL Listed 90 Minutes fire rating for demanding commercial applications. Meeting ANSI A156.3 Type 27 standards, these constant latching flush bolts provide dependable automatic operation with low actuation forces. Engineered for wood door applications where secure double door operation and fire code compliance are 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 90 Minutes
Product Model:
FB61P/FB61T
Door Hand Direction:
Non-Handed
Product Dimension:
W: 1", L: 8-1/2", D: 2"
Fire Rating:
Yes
Door Strike:
15/16" x 2-1/4" x 1/16"
Product Category:
Door Trim and Accessories
Product Substrate:
Brass or Stainless Steel
Department:
Door Hardware

Ives FB61P WD US4 – Frequently Asked Questions

1) Will the Ives FB61 flush bolt set work on a metal or hollow metal door pair?
No. The FB61 is built for wood doors, and every orderable version carries the WD wood-door designation in the part number (FB61P WD US32D, for example). For a hollow metal pair you need a metal-door bolt instead, such as the ABH 1854 Series manual flush bolt set with fire bolt for metal doors, or the ABH 1860P/1862P automatic flush bolt pair. Putting a wood-door bolt into a metal door prep will not give you a correct mortise or a correct fire-rated installation.
2) Can I use the Ives FB61 on a 90 minute fire rated wood door pair?
Yes. The FB61 is UL Listed 90 Minutes and carries a fire rating, so it is usable on a wood pair rated up to 90 minutes. If your opening is rated longer than that, this is the wrong bolt. The ABH 1860P/1862P automatic flush bolt pair is fire rated 3-hour with a thermal lock and covers the longer ratings.
3) What is the difference between ordering FB61P and FB61T?
FB61P is the pair, top bolt plus the automatic bottom bolt. FB61T is the top bolt only. Order the P version when you are doing a full inactive leaf from scratch. Order the T when the bottom of the opening is already handled, typically because a bottom bolt or an automatic bolt is already in the door and only the top unit needs replacing. Both come in the same seven finishes.
4) How does a constant latching flush bolt differ from a manual flush bolt on a pair of doors?
With a manual bolt, someone has to reach up and throw the top bolt and stoop to throw the bottom one every time the inactive leaf is secured, which is exactly why manual bolts get left unthrown. The FB61 keeps the inactive leaf latched on its own: the bottom bolt releases automatically when the active door opens and re-extends when it closes, while the top bolt is released by hand. If you want purely manual operation instead, the ABH 1855S manual flush bolt single or the Trimco 3999 corner mount flushbolt are that style. If you want the inactive leaf locked by key rather than by door sequence, the Adams Rite 1877 is a cylinder-operated flushbolt for paired wood doors.
5) What size mortise pocket do I need to rout for the Ives FB61 flush bolt?
Size the pocket to the bolt body at W: 1", L: 8-1/2", D: 2". That 8-1/2 inch length is the number that catches people out on a narrow or glazed wood stile, so check the stile has continuous solid material for the full run before you cut. The strike takes a much smaller cut at 15/16" x 2-1/4" x 1/16".
6) I keep finding the inactive door unlatched. Will the Ives FB61 fix that?
That is the exact failure it addresses. Manual flush bolts depend on a person throwing them, and in a busy building nobody does. The FB61 holds the inactive leaf latched until the active door is opened; the bottom bolt then releases on its own and re-throws when the door closes, so the pair returns to a secured state without anyone touching it. Only the top bolt is released manually, and actuation forces are kept low so it is not a fight to operate.
7) What is the equivalent automatic flush bolt set if the double doors are hollow metal instead of wood?
The Ives FB61 constant latching set is built for wood door pairs. For metal door pairs needing the same hands-free bottom bolt behavior, the ABH 1860P/1862P automatic flush bolt pair is fire rated 3 hours with a thermal lock. The FB61 carries a UL Listed 90 Minutes rating and meets ANSI A156.3 Type 27, so on a 90-minute wood pair the FB61 is the direct fit and the substrate is what drives the swap.
8) What flush bolt should I use if the inactive leaf needs to be released with a key?
The FB61 has no cylinder; its top bolt is released manually at the door edge and the bottom bolt works automatically off the active leaf. For key control of the inactive leaf on a wood pair, the Adams Rite 1877 is a cylinder-operated flushbolt for paired wood doors, and the Adams Rite 1870 Series is a cylinder-operated flushbolt with key control. Choose on whether the inactive leaf is meant to be operated by anyone at the door or only by a keyholder.
9) I only need to replace the bottom bolt on a fire rated pair. What are my options?
The Ives FB61 is sold as FB61P for the top and bottom bolts as a pair or FB61T for the top bolt only, so it does not cover a bottom-only replacement. The ABH 1858 is a universal bottom fire bolt, 1858 Series, manual operation, and the ABH 1855S is a manual flush bolt single for metal doors with a 3/4 inch throw. Note the 1858 and 1855S are manually operated, so the bottom leaf will no longer set itself the way the FB61 constant latching arrangement does.
10) Do I have to specify a hand for the Ives FB61 flush bolt?
No hand to specify. The FB61 is non-handed, so one part number covers left and right inactive leaves. For a property manager or a facility stocking spares, that means one SKU per finish on the shelf instead of two, and no field handing call at install.
11) Does the Ives FB61 meet ANSI/BHMA requirements for a commercial spec?
It meets ANSI A156.3 Type 27 and is classified as commercial-grade hardware. That is the line to quote when a spec sheet or a submittal calls for an auxiliary bolt on a paired opening, alongside the UL Listed 90 Minutes fire listing.
12) What finishes does the Ives FB61 flush bolt come in, and will it match the rest of my door hardware?
Seven finishes, and both the pair and top-only versions are offered in all of them: 605 bright brass, 606 satin brass, 612 satin bronze, 613 satin bronze oil-rubbed, 622 matte black, 629 bright stainless steel, and 630 satin stainless steel. Those are standard BHMA finish numbers, so 630 here matches 630 on your levers, closers and hinges. Construction is brass or stainless steel depending on the finish family.
13) Is the strike included with the Ives FB61, and do I need to cut the floor or threshold?
A strike at 15/16" x 2-1/4" x 1/16" is part of the set. The top bolt shoots into the frame head, and the automatic bottom bolt drops into the floor or threshold, so plan a floor strike location in the sill as part of the prep. Because that bottom bolt is automatic, the floor strike has to be positioned accurately or the leaf will not re-latch when the active door closes.
14) What else do I need to order to finish a pair of wood doors using the Ives FB61?
The FB61P covers the inactive leaf, top and bottom. On a fire rated pair you will normally also need a coordinator so the inactive leaf closes first, and an astragal, neither of which is part of this set. The active leaf still needs its own lock or exit device. Order the FB61T alone only when the bottom of the inactive leaf is already covered.
15) Is the Delaney solid brass flush bolt an alternative to the Ives FB61 on a commercial opening?
The Delaney 6 inch square end solid brass flush bolt and the Delaney 7 inch slide type mortise-in flush bolt are manual mortise bolts, as is the Delaney 7 inch mortise extension flush bolt used to reach a header on a tall leaf. The Ives FB61 is a commercial-grade set meeting ANSI A156.3 Type 27 with a UL Listed 90 Minutes fire rating and a 15/16 inch x 2-1/4 inch x 1/16 inch strike. On a fire rated commercial pair, the FB61 is the one carrying the rating and the standard; the Delaney bolts suit non-rated wood pairs where the leaf is set once and left.
16) Which flush bolt has a stated throw and offset for a door that needs a specific bolt projection?
The International Door Closers FB-1202 publishes its geometry directly: a positive U joint actuator with 5/8 inch throw, 1/8 inch offset and 7/8 inch backset, square end, with guide. The ABH 1855S single is listed with a 3/4 inch throw. The Ives FB61 is dimensioned W 1 inch, L 8-1/2 inch, D 2 inch with a 15/16 inch x 2-1/4 inch x 1/16 inch strike. If the jamb or threshold condition is dictating a specific projection, the FB-1202 and 1855S are the ones stating a throw figure to check against.
17) We standardize on one flush bolt across a facility with both wood and metal door pairs. How do we cover both?
The Ives FB61 covers the wood pairs, non-handed so there is no handing to determine leaf by leaf, and available in brass or stainless steel across finishes including 630 satin stainless, 605 bright brass and 622 matte black. For the metal pairs, ABH offers the 1854 Series manual flush bolt set with fire bolt for metal doors and the 1860P/1862P automatic flush bolt pair for metal doors. Matching operation matters as much as matching finish: pairing the automatic FB61 with the manual 1854 means two different habits for your staff.
18) Does a rounded end or square end flush bolt face plate matter when swapping brands?
It changes the door prep and the look at the edge. The Trimco 3999 is a rounded end 6 inch corner mount flushbolt while the Trimco 3999SE is the square end version of the same 6 inch corner mount; the Orca Hardware 6 inch bolt has radius corners and the International Door Closers FB-1202 is square end. The Ives FB61 measures W 1 inch, L 8-1/2 inch, D 2 inch, so a swap from a 6 inch face plate to the FB61 means a longer mortise in the door edge rather than a drop-in exchange.
How fast can I get the Ives FB61P WD US4 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 FB61P WD US4 come with a warranty?
Absolutely. The Ives FB61P WD US4 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 FB61P WD US4?
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