Ives FB51 Constant Latching Fl...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$325.20
$156.72
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Ives FB51 Constant Latching Flush Bolts for Metal Doors Pair with 36" Rod Length

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Model: FB51P36MD32D
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$325.20
$156.72
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Ives FB51 Constant Latching Flush Bolts for Metal Doors Pair with 36" 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 FB51P36MD32D – Frequently Asked Questions

1) Do I need to order a left hand and right hand Ives FB51 flush bolt?
No handing to specify. The FB51 is non-handed, so the same bolt goes on either leaf and you can stock one part number for a whole building.
2) How deep does the FB51 bolt throw into the head frame and the threshold?
The bolt throws 3/4 inch, with 7/8 inch of vertical adjustment to take up gaps at the head and sill, and a 3/4 inch bolt backset. That 7/8 inch of adjustment is what lets you dial in the engagement after the frame is set rather than re-prepping the door.
3) The Ives FB51 is for metal doors - what flush bolt should I use on a wood door pair instead?
The FB51 is engineered for metal doors only, so on a paired wood door look at the Adams Rite 1877 cylinder-operated flushbolt, which is built for paired wood doors. The Delaney 7 inch slide type mortise flush bolt, the Delaney 6 inch square end solid brass flush bolt, and the Trimco 3999 6 inch corner mount rounded end flushbolt are also mortise and corner mount styles used on wood stiles. Note that the Adams Rite 1877 is cylinder operated and keyed, which is a different operation from the FB51 constant latching action.
4) What is the closest automatic flush bolt equivalent to the Ives FB51 for a fire rated metal door pair?
The ABH 1860P/1862P automatic flush bolt pair is the nearest cross-brand match. It is sold as a pair like the FB51P top and bottom bolt set, it is fire rated 3-hour, and it uses a thermal lock mechanism. The FB51 is UL Listed 3 Hours and certified to ANSI A156.3 Type 27, non-handed, with a 15/16 by 2-1/4 by 1/16 inch door strike. Both are built for the inactive leaf of a metal door pair, so the decision usually comes down to whether you want the FB51 constant latching action, where the inactive door stays latched until the active door opens, or the ABH thermal lock design.
5) Is the International Door Closers FB-1202 a direct swap for an Ives FB51?
No - the prep and the throw differ. The IDC FB-1202 is a flush bolt with a positive U joint actuator, 5/8 inch throw, 1/8 inch offset, 7/8 inch backset, square end, with guide. The Ives FB51 has a 3/4 inch bolt throw and a 3/4 inch bolt backset with 7/8 inch vertical adjustment. Different backset and throw means the existing strike pocket and door mortise will not line up, so treat the FB-1202 as a new prep rather than a drop-in for an FB51 opening.
6) Do flush bolts need a door coordinator on a fire rated pair?
Flush bolts hold the inactive leaf, but they do nothing to sequence the two leaves as they close. On a rated pair with overlapping astragals, the inactive leaf has to close first, and that is a coordinator's job, ordered separately from the FB51.
7) What is an automatic flush bolt versus the Ives FB51 constant latching type?
Both spare the user from throwing a bolt by hand. On the FB51, the bottom bolt releases automatically when the active leaf opens while the top bolt can be released manually, giving you control over whether the inactive leaf stays anchored at the head. A fully automatic set such as the ABH 1860P/1862P pair, fire rated 3 hour with a thermal lock, releases on its own trigger instead. Pick the FB51 when you want the top bolt to stay put until someone decides otherwise.
8) What flush bolt should I use instead of the Ives FB51 if I need the inactive leaf key controlled?
The FB51 releases by the active door opening, with the top bolt manually released - there is no cylinder. If the inactive leaf has to be locked and released with a key, the Adams Rite 1870 Series cylinder-operated flushbolt provides key control, and the Adams Rite 1877 is the cylinder-operated version for paired wood doors. For a two-point setup, the Adams Rite MS1880/MS1881 two-point flushbolts use an interlock mechanism and the MS2180 Series is an auto-release two-point flushbolt with a Smartlock mechanism.
9) Can I replace just the bottom bolt of an Ives FB51 pair with a universal bottom bolt?
The ABH 1858 universal bottom fire bolt is a manual operation bottom bolt, so it is a bottom-only device rather than a top and bottom set like the FB51P. Substituting it changes how the leaf behaves: the FB51 constant latching bottom bolt releases automatically when the active door opens, while the 1858 is operated manually. On a fire rated pair, confirm the whole assembly still matches the door label - the FB51 is UL Listed 3 Hours to ANSI A156.3 Type 27, and mixing devices on one leaf changes what was tested together.
10) Is the Ives FB51 finish going to match the other stainless hardware in my building?
It comes in 630, satin stainless steel, the standard commercial finish that lines up with satin stainless hinges, push plates and exit hardware across a facility.
11) I need a longer reach at the top of a tall wood leaf - what flush bolt covers that instead of the Ives FB51?
The Delaney 4363 is a 7 inch mortise extension flush bolt and the Delaney 4101 is a 7 inch slide type mortise flush bolt, both longer face plates for mortise prep in a wood stile. The Ives FB51 is a metal door device with a 6-3/4 inch long body and a 12 inch rod measured from the center of the bolt body to the bolt tip. Match the substitute to the door material first - the FB51 rod length solves top bolt reach on a metal leaf, while the Delaney extension addresses face plate length on a wood mortise.
12) What is the difference between the Ives FB51 and the Emtek flush bolts for a residential double door?
Emtek flush bolts are a residential-style flush bolt line, chosen alongside matching decorative trim. The Ives FB51 is a commercial device for metal doors, non-handed, UL Listed 3 Hours and certified to ANSI A156.3 Type 27, with constant latching operation on the inactive leaf. On an interior residential pair with no label requirement, the Emtek bolts fit the aesthetic; where a fire label or an ANSI type is called out on the drawing, the FB51 is the one carrying those certifications.
How fast can I get the Ives FB51P36MD32D 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 FB51P36MD32D come with a warranty?
Absolutely. The Ives FB51P36MD32D 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 FB51P36MD32D?
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
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