Ives FB41 Automatic Flush Bolt...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$319.70
$157.63
Ives FB41P Automatic Flush Bolt Set for Wood Doors – Top and Bottom Bolt Pair, 630 Satin Stainless Steel finish, product view

Ives FB41 Automatic Flush Bolt Set for Wood Doors with 3/4" Throw

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Model: FB41P WD US32D
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Ives FB41 Automatic Flush Bolt for Wood Doors: 3/4" Throw, UL Listed 90-Minute

The Ives FB41 is a fully automatic flush bolt system engineered for wood double-door applications. When the active door closes, the bolt extends automatically; when the active door opens, it retracts - no manual operation required. Available as a top-and-bottom pair (FB41P), top bolt only (FB41T), or bottom bolt only (FB41B), in seven finishes from Bright Brass to Matte Black. Non-handed. UL Listed for 90-minute fire-rated openings. Meets ANSI A156.3 Type 25.

Key Features

  • Fully Automatic Operation: Bolt extends on active-door close, retracts on open - no thumb turn or manual throw required.
  • 3/4" Bolt Throw with 7/8" Vertical Adjustment: Provides reliable strike engagement and installation flexibility to accommodate minor frame variations.
  • Low Actuation Force: Top bolt operates without spring tension, reducing wear and effort over the life of the hardware.
  • UL Listed 90-Minute Fire Rating: Code-compliant for fire-rated wood door openings in commercial applications.
  • Non-Handed: Single SKU works on any door swing; simplifies specification and inventory.
  • Brass or Stainless Steel Construction: Corrosion-resistant substrate in both material options; seven finish choices (605 Bright Brass, 606 Satin Brass, 612 Satin Bronze, 613 Satin Bronze Oil-Rubbed, 622 Matte Black, 629 Bright Stainless Steel, 630 Satin Stainless Steel).

Technical Specifications

  • Model Options: FB41P (Top & Bottom Pair), FB41T (Top Bolt Only), FB41B (Bottom Bolt Only)
  • Bolt Throw: 3/4"
  • Vertical Adjustment: 7/8"
  • Body Dimensions: 1" W × 8-1/2" L × 2" D
  • Door Type: Wood
  • Hand: Non-Handed
  • Substrate: Brass or Stainless Steel
  • ANSI/BHMA: ANSI A156.3 Type 25
  • UL Listing: UL Listed 90 Minutes
  • Application: Commercial

Typical Applications

  • Commercial office and retail double-door entries
  • Fire-rated corridor and stairwell doors in healthcare, education, and government facilities
  • Multi-family and hospitality common-area double doors
  • Industrial and warehouse egress pairs requiring automatic latching

Resources

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
UL Listing Type:
UL Listed 90 Minutes
Product Model:
FB41
Door Hand Direction:
Non-Handed
Product Dimension:
W: 1", L: 8-1/2", D: 2"
Fire Rating:
90 Minutes
Product Category:
Door Trim and Accessories
Product Substrate:
Brass or Stainless Steel
Department:
Door Hardware

Ives FB41P WD US32D – Frequently Asked Questions

1) Do I need to order a left hand and right hand version of the Ives FB41?
No handing to specify. The FB41 is non-handed, so one part number covers either swing and either leaf position. That is worth knowing if you are stocking spares across a building: one SKU per finish covers every pair you own.
2) Can I use the FB41 automatic flush bolt on a 90-minute fire rated wood pair?
Yes. The FB41 carries a UL Listing of 90 minutes and meets ANSI A156.3 Type 25, which is the automatic flush bolt category. That covers fire-rated corridor and stair pairs up to a 90-minute rating. For an opening that needs a longer rating, the ABH 1860P/1862P automatic pair is listed as fire rated 3-hour with a thermal lock.
3) What is the difference between an automatic flush bolt and a manual flush bolt on a pair of doors?
An automatic bolt like the Ives FB41 throws itself when the active leaf closes and retracts when it opens, so nobody has to remember to secure the inactive leaf. A manual bolt has to be thrown and released by hand at the top and bottom of the door, which is fine on a leaf that stays shut for months but wrong on a pair people open both sides of daily. Manual options include the ABH 1854 Series with fire bolt and the Trimco 3999 6 inch corner mount. If you want key control over who releases the inactive leaf, that is a cylinder-operated bolt instead, like the Adams Rite 1877 for paired wood doors.
4) Do I have to buy the FB41 as a pair, or can I get just the top bolt?
Three ways to order it. FB41P is the top and bottom pair, FB41T is the top bolt on its own, and FB41B is the bottom bolt on its own. The singles are what you want when you are replacing one failed bolt on an existing pair, or when the bottom of the opening is handled by other hardware. All three come in every one of the seven finishes.
5) Will the FB41 bolt reach my existing strike, and is there any adjustment if the frame is off?
Bolt throw is 3/4 inch, with 7/8 inch of vertical adjustment built into the bolt. That adjustment is the part that matters on a retrofit: if the head strike or floor strike in your frame sits slightly high or low from settling or an out-of-square frame, you can shift the bolt to meet it rather than re-prepping the frame. If your existing strike sits deeper than a 3/4 inch throw can reach, this will not engage.
6) We keep having to re-secure the inactive leaf on our double doors. Will automatic flush bolts fix that?
That is exactly the failure automatic bolts are for. With the FB41, closing the active leaf throws the bolt into the head and floor strikes on its own, and opening it retracts them, so the inactive leaf is secured whether or not staff bother with it. The top bolt runs without spring tension, which cuts actuation force and wear over a high-traffic life. In a fire-rated corridor pair this matters twice over, since a manually thrown bolt left unthrown means the inactive leaf is not latched when it needs to be.
7) What is the closest equivalent to the Ives FB41 automatic flush bolt for a pair of metal doors instead of wood?
The Ives FB41 is built for wood double-door openings and is UL Listed for 90-minute fire-rated use. For a metal pair that still latches automatically when the active leaf closes, the ABH 1860P/1862P automatic flush bolt pair is the corresponding part; it is a fire-rated 3-hour set with a thermal lock. Both are automatic sets rather than manual bolts, so the operation on the opening is the same - the difference is the door substrate the prep is cut into and the fire duration each carries.
8) I do not need the bolt to throw by itself - what is a simpler manual flush bolt with the same 3/4 inch throw?
The Ives FB41 throws and retracts automatically with the active door, with a 3/4 inch bolt throw. If the opening is fine with a bolt the user throws by hand, the ABH 1855S is a manual flush bolt single for metal doors carrying the same 3/4 inch throw. The trade is operation, not engagement depth: someone has to reach the bolt on the ABH, where the FB41 handles it on every close.
9) Can I use a Delaney solid brass flush bolt in place of the Ives FB41 on a commercial fire-rated pair?
The Ives FB41 is a commercial part meeting ANSI A156.3 Type 25 and UL Listed for 90 minutes. The Delaney options are a 6 inch square end solid brass flush bolt, a 7 inch slide type mortise-in flush bolt, and a 7 inch mortise extension flush bolt - manual mortise-in bolts of a different length and operation. The Emtek Flush Bolts sit in the same manual mortise-in family. For an opening being held to a fire rating and an automatic latching requirement, the FB41 is the part that carries those.
10) The bolt I am replacing has a 5/8 inch throw - will the Ives FB41 engage the same strike?
Not identically. The Ives FB41 throws 3/4 inch with 7/8 inch of vertical adjustment. The International Door Closers FB-1202 is a 5/8 inch throw flush bolt with a positive U joint actuator, 1/8 inch offset and 7/8 inch backset. The extra 1/8 inch of throw on the FB41 means the strike depth in the head and threshold has to suit the longer bolt, so check the existing strike prep before treating them as interchangeable.
11) What size mortise pocket do I need to rout in the door edge for an Ives FB41 flush bolt?
The bolt body measures W: 1 inch, L: 8-1/2 inch, D: 2 inch, so the leaf edge needs a pocket that takes that body plus room for the face plate. On a fire-rated wood pair, confirm the door manufacturer permits the prep depth before you cut. Door prep dimensions and strike requirements are in the Ives Full Line Catalog.
12) What finishes does the Ives FB41 flush bolt come in, and will they match my other door hardware?
Seven finishes: 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 codes, so 630 on the flush bolt matches 630 hinges, push plates and exit trim from any manufacturer using the same code. Every finish is available in all three model configurations.
13) Is the FB41 rated for commercial traffic or is it a residential flush bolt?
Commercial. The FB41 is specified for commercial openings and carries ANSI A156.3 Type 25 along with a 90-minute UL Listing, which is the combination an institutional spec asks for on office, retail, healthcare, education and hospitality pairs. Lighter residential-grade bolts, such as the Delaney 6 inch square end solid brass flush bolt or the Orca 6 inch flush bolt with radius corners, are manual surface or mortise bolts without that listing on our record.
14) I need to lock the inactive leaf with a key rather than have it release automatically. Is the FB41 the right bolt?
No, and this is the wrong direction for the FB41. It is fully automatic, so the inactive leaf frees itself every time the active leaf opens, with no key involved. For key control over the inactive leaf, look at the Adams Rite 1870 Series cylinder-operated flushbolt, or the 1877 for paired wood doors. If you want two-point throw with an interlock, the Adams Rite MS1880/MS1881 does that; the MS2180 Series is an auto-release two-point bolt.
15) Just the bottom bolt on our double doors is broken. Can I replace only that one and keep the top?
Order the FB41B, which is the bottom bolt on its own, in the finish that matches what is on the door. Because the FB41 is non-handed, one part covers either leaf. Take a moment to confirm the existing mortise takes a body of W: 1 inch, L: 8-1/2 inch, D: 2 inch; if the old bolt was a different make, the pocket may need enlarging.
16) What else do I need to order besides the flush bolts to finish a pair of wood doors?
The bolts throw into strikes, so the head and the floor (or threshold) of the opening have to be prepped and struck to receive them, and a pair using flush bolts on the inactive leaf normally needs a door coordinator so the leaves close in the right order. The FB41 does not include the strikes or the coordinator. Strike requirements and door prep dimensions are laid out in the Ives Full Line Catalog.
17) Is a 6 inch corner-mount flushbolt like the Trimco 3999 a substitute for the Ives FB41?
They are different parts despite the shared name. The Ives FB41 is an automatic set with a 1 inch by 8-1/2 inch by 2 inch body that throws on active-door close. The Trimco 3999 is a 6 inch corner-mount flushbolt with a rounded end and the Trimco 3999SE is the 6 inch corner-mount square end version - corner-mount manual bolts sized and prepped differently from the FB41 body. Swapping one for the other means a different mortise and a different way of operating the inactive leaf.
18) What should I use instead of the Ives FB41 if only the bottom of the inactive leaf needs a fire bolt?
The Ives FB41 covers that as FB41B, the bottom bolt only, in the same seven finishes as the pair. On a metal opening, the ABH 1858 is a universal bottom fire bolt, manual operation. The Ives bottom bolt still works off the active door automatically; the ABH bottom bolt is thrown by hand.
19) What is the difference between the Ives FB41 and a two-point flushbolt like the Adams Rite MS1880?
The Ives FB41 is a top and bottom pair of automatic bolts sold as FB41P, or as separate top (FB41T) and bottom (FB41B) units, each acting on its own. The Adams Rite MS1880/MS1881 are two-point flushbolts with an interlock mechanism, and the Adams Rite MS2180 Series is an auto-release two-point flushbolt with a Smartlock mechanism - designs that tie the two points together through one mechanism. Choose by whether the opening wants two independent bolts or a linked two-point action.
20) Is there a manual flush bolt set with a fire bolt if my pair is hollow metal rather than wood?
Yes. The Ives FB41 is prepped for wood doors. For hollow metal, the ABH 1854 Series is a manual flush bolt set with fire bolt for metal doors, covering the top and bottom of the inactive leaf. It is manual where the FB41 is automatic, so the inactive leaf is set by hand rather than by the active door closing on it.
21) Is the Ives FB41 flush bolt brass or stainless steel?
Both are offered, and the finish you pick decides it. The substrate is brass or stainless steel depending on the finish family, and both are corrosion resistant. On exterior-facing or wash-down openings, the stainless finishes (629 Bright, 630 Satin) are the usual pick; brass finishes suit interior lobby and corridor pairs where the look is matched to the rest of the trim.
How fast can I get the Ives FB41P WD US32D delivered?
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Can I return it if it doesn’t work for me?
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Does the Ives FB41P WD US32D come with a warranty?
Absolutely. The Ives FB41P WD 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 FB41P WD US32D?
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