Ives FB358 Manual Flush Bolt w...
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$28.27
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Ives FB358 Manual Flush Bolt with 3/4" Throw and 1/2" Bolt Diameter

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Model: FB358 US26D
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$58.20
$28.27
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Ives Manual Flush Bolt with 3/4" Throw and 1/2" Bolt Diameter

Professional Manual Flush Bolt for Double Door Applications

The Ives FB358 Manual Flush Bolt provides secure anchoring for inactive doors in double door installations. This non-handed flush bolt features a 1/2" diameter bolt with 3/4" throw and 7/8" vertical adjustment capability. Constructed with brass substrate and measuring 1" x 6-3/4" x 1-3/8", this UL Listed fire-rated flush bolt meets ANSI A156.16 standards for commercial applications.

Professional Features & Benefits

  • Precise Bolt Specifications: 1/2" diameter bolt with 3/4" throw and 3/4" backset provides reliable engagement with door strike.
  • Vertical Adjustment Range: 7/8" vertical adjustment allows precise alignment during installation for optimal performance.
  • Simplified Installation: Requires only simple router mortise at top and bottom corners of doors, reducing installation costs and complexity.
  • Reinforced Door Construction: Door strength and rigidity maintained by tying door faces to reinforcing extensions on guide with machine screws and bearing washers.
  • Non-Handed Design: Universal configuration eliminates handing concerns for streamlined inventory and installation.
  • Fire-Rated Performance: UL Listed for 90 minutes fire door applications ensuring code compliance in commercial buildings.
  • Manual Operation Control: Lever can be moved to 'up' position to retract bolt for opening inactive leaf, or 'down' position to project bolt into strike for secure locking.
  • Professional-Grade Materials: Brass substrate construction provides durability and corrosion resistance for long-term commercial use.

Technical Specifications

  • ANSI/BHMA: ANSI A156.16, L04261
  • Commercial/Residential: Commercial
  • Department: Door Hardware
  • Door Strike: 15/16" x 2-1/4" x 5/64"
  • Fire Rating: Yes
  • Product Category: Door Trim and Accessories
  • Product Dimension: 1" x 6-3/4" x 1-3/8"
  • Product Group: Door Trim and Accessories
  • Product Model: FB358
  • Product Subgroup: Flush Bolts
  • Product Substrate: Brass
  • 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 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 flush bolts deliver professional-grade reliability with brass substrate construction and UL Listed 90-minute fire rating for demanding commercial applications. Meeting ANSI A156.16 standards with precise 1/2" bolt diameter and 3/4" throw specifications, this manual flush bolt provides dependable door anchoring performance. Engineered for commercial door hardware applications where secure inactive door latching 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 A156.16, L04261
Commercial/Residential:
Commercial
UL Listing Type:
UL Listed 90 Minutes
Product Model:
FB358
Product Dimension:
1" x 6-3/4" x 1-3/8"
Fire Rating:
Yes
Door Strike:
15/16" x 2-1/4" x 5/64"
Product Category:
Door Trim and Accessories
Product Substrate:
Brass
Department:
Door Hardware

Ives FB358 US26D – Frequently Asked Questions

1) Will the Ives FB358 flush bolt work on a pair of doors with no mullion?
That's exactly what the FB358 is for. It mounts into the inactive leaf of a double door and anchors it to the frame head or the floor so the active leaf has something to latch against. Operation is manual: flip the lever up to retract the bolt and free the inactive leaf, down to project it into the strike. The bolt is 1/2 inch diameter with a 3/4 inch throw, so the strike has to be set to receive that. It is non-handed, so one part number covers left and right hand pairs.
2) What strike do I need to cut for an Ives FB358 flush bolt, and how much room does the mortise take?
The strike for the FB358 measures 15/16 x 2-1/4 x 5/64 inches. The bolt body itself is 1 x 6-3/4 x 1-3/8 inches, so plan the router mortise at the top or bottom corner of the door around that. Backset is 3/4 inch from the door edge to the bolt centerline. There is 7/8 inch of vertical adjustment built in, which is what saves you when the frame strike and the door prep don't line up perfectly on the first try.
3) How many do I need to order to secure one inactive door leaf?
One FB358 is a single bolt. Standard practice on an inactive leaf is a bolt top and bottom, so that's two per leaf. Since the bolt is non-handed and works at either corner, you order the same number twice rather than a top part and a bottom part. If you would rather buy it as a matched pair in one box, the ABH 1854 Series is sold as a manual flush bolt set with fire bolt for metal doors.
4) Should I use a manual flush bolt or an automatic one on my inactive door?
Manual, like the FB358, means someone throws the lever by hand each time the inactive leaf is closed. That's fine on a door that stays shut most of the time, like a stockroom or an equipment pair. It is the cheaper prep and the simpler part. Automatic flush bolts throw themselves when the inactive leaf closes, which is what you want on an egress pair the public uses, because nobody has to remember. If that's your opening, look at the ABH 1860P/1862P automatic flush bolt pair instead. Some jurisdictions require automatic or self-latching bolts on fire rated egress pairs, so check what your AHJ has approved before you commit to manual.
5) Can I use the Ives FB358 to replace a 5/8 inch throw flush bolt already in my door?
Careful here. The FB358 throws 3/4 inch on a 3/4 inch backset. The International Door Closers FB-1202, for example, throws 5/8 inch on a 7/8 inch backset with a 1/8 inch offset. Different backset means the bolt lands in a different spot relative to the door edge, so an existing strike cut for one will not necessarily take the other. Measure the existing bolt centerline off the door edge before you swap; if it's 3/4 inch you are in business, if it's 7/8 inch you are re-cutting the strike.
6) Can the inactive leaf bolts be key operated rather than thrown by hand like the Ives FB358?
The FB358 is lever operated at the bolt itself, with no cylinder. If the inactive leaf needs to be under key control, the Adams Rite 1870 Series is a cylinder-operated flushbolt with key control, and the Adams Rite 1877 is a cylinder-operated flushbolt made for paired wood doors. Cylinder operation adds a keyway to schedule and key into the facility system, which the FB358 does not require.
7) What is the closest equivalent to the Ives FB358 manual flush bolt for hollow metal doors?
The FB358 is a manual flush bolt with a 3/4 inch throw, sold as a single bolt for the inactive leaf of a pair. The ABH 1855S is the nearest match in that same configuration: a manual flush bolt single for metal doors with a 3/4 inch throw. If you need the bolts supplied as a set rather than singly, the ABH 1854 Series is a manual flush bolt set that includes a fire bolt for metal doors. The FB358 carries a UL Listed 90 minute rating and meets ANSI A156.16, so on a fire rated pair confirm the label hours you need before swapping to any of these.
8) The inactive leaf gets used too often for staff to reach up and throw a bolt by hand. What should I use instead of the Ives FB358?
The FB358 is manual: the lever is moved up to retract the bolt and down to project it into the strike, which means someone has to operate each bolt every time the inactive leaf is opened. For openings where that will not happen reliably, the ABH 1860P/1862P is an automatic flush bolt pair, fire rated 3 hour with a thermal lock, which releases and resets from the action of the active leaf. The Adams Rite MS2180 Series is an auto-release two-point flushbolt with a Smartlock mechanism, throwing top and bottom from one unit. All three change the door prep, so plan the mortise around whichever you specify.
9) Is the International Door Closers FB-1202 a drop-in replacement for the Ives FB358?
No, the two bolt geometries differ. The FB358 has a 1/2 inch diameter bolt with a 3/4 inch throw and a 3/4 inch backset. The IDC FB-1202 is a positive U joint actuator flush bolt with a 5/8 inch throw and a 1/8 inch offset with a 7/8 inch backset, square end, with guide. Different throw and different backset means the existing strike pocket and the door rout will not line up on a straight swap, so treat the FB-1202 as a new prep rather than a retrofit into FB358 preparation.
10) Do I have to order a left hand and a right hand version of the Ives FB358?
No. The FB358 is non-handed, so the same part works on either leaf and at either the head or the sill. Property managers standardizing across a building only need to stock one part number per finish.
11) What is the difference between the Ives FB358 and a 6 inch corner mount flushbolt like the Trimco 3999?
Body length and end shape are what separate them. The FB358 body measures 1 x 6-3/4 x 1-3/8 inches. The Trimco 3999 is a 6 inch corner mount with a rounded end, and the 3999SE is the same 6 inch corner mount with a square end. If you are replacing an existing bolt and want the new faceplate to cover the old mortise without patching, match the length and the end shape to what's already cut in the door. A 6-3/4 inch body will not sit in a mortise routed for a 6 inch bolt without lengthening it.
12) Do I need a separate part for the top bolt and the bottom bolt on the inactive leaf?
Not with the FB358. Because it is non-handed and the same body serves either corner, one model number covers top and bottom. Other lines split them out, for instance the ABH 1858 is a universal bottom fire bolt specifically. Keeping a single non-handed part on the shelf is why maintenance shops standardize on this style.
13) Our double doors are wood. Does the Ives FB358 still apply, or is there a wood door specific flush bolt?
The FB358 is non-handed and installs with a simple router mortise at the top and bottom corners of the door, with the door faces tied to reinforcing extensions on the guide using machine screws and bearing washers, which suits wood leaves. If you want a bolt built specifically around paired wood doors and need key control at the same time, the Adams Rite 1877 is a cylinder-operated flushbolt for paired wood doors. The ABH 1855S and ABH 1854 Series are the metal door counterparts, so do not pull those for a wood pair.
14) I only need to secure the bottom of the inactive leaf. Is there a bottom-only fire bolt instead of a full flush bolt?
Yes. The FB358 is a non-handed manual flush bolt that can be used at the top or bottom corner of the inactive leaf, so a pair of them covers both ends of the door. If you are replacing only the bottom bolt, the ABH 1858 is a universal bottom fire bolt with manual operation, built specifically for that position. The FB358 mortises into a routed pocket at the corner of the door and uses a 15/16 inch x 2-1/4 inch x 5/64 inch strike, so match the existing prep before deciding which one drops in.
15) What is the difference between the Ives FB358 and a two-point flushbolt like the Adams Rite MS1880?
The FB358 is a single bolt unit, non-handed, mortised into one corner of the inactive leaf, so a top and a bottom bolt are two separate devices each thrown on its own. The Adams Rite MS1880/MS1881 is a two-point flushbolt with an interlock mechanism, meaning one unit drives both the top and bottom points together. Choose the two-point when you want a single operating point on the leaf, and the FB358 when the door prep is a simple router mortise at each corner.
16) We are doing a residential double door and do not need a fire rating. Is there a simpler flush bolt than the Ives FB358?
The FB358 is a commercial flush bolt with a brass substrate, UL Listed 90 minutes and ANSI A156.16 compliance, which is more device than an unrated interior pair needs. Simpler options include the Delaney 6 inch square end solid brass flush bolt, the Delaney 7 inch slide type mortise in flush bolt, and the Orca Hardware 6 inch flush bolt with radius corners. These are surface-visible face plates in shorter lengths for lighter duty pairs; the FB358 is the one to keep when the opening is a labeled fire door.
17) The existing flush bolt face plate has a rounded end. Will the Ives FB358 match, or should I use a Trimco?
Face plate end shape decides whether a bolt drops into an existing rout. The FB358 face measures 1 inch x 6-3/4 inch x 1-3/8 inch. Among the Trimco corner mount flushbolts, the 3999 is a 6 inch corner mount with a rounded end and the 3999SE is the 6 inch corner mount in a square end, so you can match either existing pocket shape at the shorter length. Pull the existing plate and measure the rout length and end radius before ordering.
18) The bottom bolt on our pair never lines up with the floor strike. Is there a flush bolt with more adjustment than a standard one?
The FB358 carries 7/8 inch of vertical adjustment at the bolt, which is what lets you dial in alignment after the door is hung rather than re-cutting the strike. It uses a 15/16 inch x 2-1/4 inch x 5/64 inch strike. If the misalignment is coming from the leaf itself rather than the bolt, an extension style bolt such as the Delaney 7 inch mortise extension in flush bolt reaches further from the mortise, and the ABH 1858 universal bottom fire bolt is purpose built for the bottom position. Measure the gap between the bolt tip and the strike at rest before choosing.
19) Is the Ives FB358 flush bolt solid brass, and will it hold up in a coastal or high traffic building?
Brass substrate, which is what gives it corrosion resistance for long term commercial service. It is built as commercial grade hardware and carries ANSI A156.16 with function L04261. For a decorative opening where you want solid brass in a shorter body, the Delaney 6 inch square end solid brass flush bolt is another option we carry, though it is not a fire rated commercial part the way the FB358 is.
20) We are standardizing flush bolt finishes across a building. How does the Ives FB358 compare to Emtek flush bolts on finish selection?
The FB358 is offered in nine finishes: 605 bright brass, 606 satin brass, 612 satin bronze, 613 satin bronze oil-rubbed, 619 satin nickel, 622 matte black, 625 bright chrome, 626 satin chrome, and 643E aged bronze. Emtek flush bolts are the decorative-line alternative if the pair is being matched to residential-style trim rather than to a commercial finish schedule. For a facility standardizing on BHMA finish numbers across doors, the FB358 finish codes line up with the rest of a commercial hardware schedule.
How fast can I get the Ives FB358 US26D delivered?
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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 FB358 US26D come with a warranty?
Absolutely. The Ives FB358 US26D 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 FB358 US26D?
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