Cal-Royal UNIFB540 Universal F...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$191.26
Cal-Royal Cal-Royal UNIFB540 Metal and Wood Door Universal Flush Bolts CAL-UNIFB540

Cal-Royal UNIFB540 Universal Flush Bolt for Metal and Wood Doors with Auto Latch and Fire Latch Combination

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Model: UNIFB540-US1
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$191.26
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Cal-Royal UNIFB540 Universal Flush Bolt for Metal and Wood Doors with Auto Latch and Fire Latch Combination

The Cal-Royal UNIFB540 Universal Flush Bolt is engineered for both metal and wood doors, combining a top-mounted Auto Flush Bolt with a bottom-mounted Fire Latch Bolt in a single, coordinated assembly. The self-latching top unit features a 1" x 8 ½" face plate, a ½" square bolt head, and a bolt throw of 3/4", secured with #8 x 3/4" fasteners. The bottom auxiliary latch uses a 1" x 1 3/4" face plate with a 7/8" bore body, delivering reliable secondary door control. Built to ANSI/BHMA A156.3-2008, Type 25 standards, this flush bolt combination is designed for demanding commercial door applications requiring dependable latching performance.

Key Features

  • Self-Latching Top Bolt Dimensions: Face plate measures 1" x 8 ½" with a ½" square bolt head and 3/4" bolt throw for secure automatic engagement.
  • Auxiliary Latch Bottom Bolt Dimensions: Face plate measures 1" x 1 3/4" with a 7/8" bore body for reliable secondary latching.
  • Fastener Specification: Includes #8 x 3/4" fasteners for secure top bolt installation.
  • Auto Flush Bolt & Fire Latch Combination: Top self-latching Auto Flush Bolt paired with a bottom Fire Latch Bolt for coordinated, dual-point door securement.
  • Universal Door Compatibility: Designed for use on both metal and wood doors, offering flexible installation across varied door constructions.
  • ANSI/BHMA Compliance: Manufactured to ANSI/BHMA A156.3-2008, Type 25 standards for verified commercial-grade performance.

Certifications & Compliance

  • ANSI/BHMA A156.3-2008, Type 25

Technical Specifications

  • Product Group: Door Trim and Accessories
  • Product Subgroup: Flush Bolts
  • Product Type: Flush Bolts
  • Commercial/Residential: Commercial
  • Subcategory: Flush Bolts
  • Product Category: Door Trim and Accessories
  • Department: Door Hardware

Typical Applications

  • Commercial Office Buildings
  • Educational Facilities
  • Healthcare Institutions
  • Retail Establishments
  • Industrial and Warehouse Facilities
  • Multi-Tenant Residential Properties
  • Government and Municipal Buildings

Why Cal-Royal UNIFB540?

Cal-Royal flush bolt hardware is built to ANSI/BHMA A156.3-2008, Type 25 standards, ensuring verified performance for demanding commercial door applications. The precisely specified face plates, bolt throw, and bore dimensions ensure consistent fit and dependable operation across metal and wood door installations. Engineered for professionals who require coordinated dual-bolt latching they can trust in high-use commercial settings.

Product Specs

Product Group:
Door Trim and Accessories
Product Subgroup:
Flush Bolts
Product Type:
Flush Bolts
Commercial/Residential:
Commercial
Subcategory:
Flush Bolts
Product Category:
Door Trim and Accessories
Department:
Door Hardware

Cal-Royal UNIFB540-US1 – Frequently Asked Questions

1) What exactly comes in the UNIFB540 set, top and bottom?
It's a coordinated two-piece set for the inactive leaf of a pair: a self-latching Auto Flush Bolt at the top and an auxiliary Fire Latch Bolt at the bottom. Mounting screws for the top bolt (#8 x 3/4 inch) are included. Both pieces ship together as one assembly, so you are not ordering the top and bottom separately the way you would with some manual bolt lines.
2) What ANSI standard does the Cal-Royal UNIFB540 meet?
It is built to ANSI/BHMA A156.3-2008, Type 25. That is the auxiliary locks and associated products standard, and Type 25 is the classification a spec writer will be looking for on an automatic flush bolt line item. It is a commercial-duty product, not a residential one.
3) What is the closest equivalent to the Cal-Royal UNIFB540 for a pair of wood doors needing a top automatic bolt with a bottom fire latch?
The Ives FB42 WD is the nearest match in function: it is a top automatic flush bolt for wood doors with an auxiliary fire latch, the same top-auto plus bottom-fire-latch pairing the UNIFB540 delivers. The difference is scope of door construction. The UNIFB540 is built for both metal and wood doors, so it covers mixed openings across a building, while the FB42 WD is specified for wood doors. If the pair in question is wood on both leaves, either arrangement addresses the opening; if you are standardizing across wood and hollow metal pairs, the universal unit keeps one part number on the order.
4) If I want a full automatic flush bolt set for wood doors instead of the Cal-Royal UNIFB540, what should I look at?
The Ives FB41 is an automatic flush bolt set for wood doors with a 3/4 inch throw and a 90 minute fire rating. It matches the UNIFB540 on bolt throw, which is also 3/4 inch on the top self-latching bolt. The FB41 is sold as a set specified to wood doors, whereas the UNIFB540 combines a top Auto Flush Bolt with a bottom Fire Latch Bolt and is engineered for both metal and wood construction. Choose by door material and by whether your fire door assembly listing calls for a stated 90 minute rating.
5) We need the inactive leaf key controlled rather than automatic. What flush bolt handles that instead of the Cal-Royal UNIFB540?
Look at the Adams Rite 1870 Series, a cylinder-operated flushbolt with key control, or the Adams Rite 1877 for paired wood doors, also cylinder operated. Those put the inactive leaf under a keyed cylinder so only a keyholder can release it. The Cal-Royal UNIFB540 has no cylinder; its top bolt is self-latching and the bottom is an auxiliary fire latch, so the leaf releases with the hardware rather than with a key. Choose the cylinder-operated units where you need to stop staff or tenants from opening the second leaf at will.
6) Our spec calls for a 3-hour fire rated automatic flush bolt pair. Does the Cal-Royal UNIFB540 cover that, or is there another option?
The ABH 1860P/1862P is an automatic flush bolt pair stated as fire rated 3-hour with a thermal lock, which is the unit to quote when the drawing calls out a 3-hour assembly. The Cal-Royal UNIFB540 is built to ANSI/BHMA A156.3-2008 Type 25 and combines a self-latching top Auto Flush Bolt with a bottom Fire Latch Bolt for metal and wood doors. Match the bolt to the rating stated on the door label and the opening's listing.
7) Automatic flush bolt or manual flush bolt for a pair of doors - which should I use?
An automatic bolt like the UNIFB540 top unit self-latches when the active leaf closes, so nobody has to remember to throw it, and the inactive leaf releases when the active leaf opens. That's what you want on egress pairs and anywhere the second leaf gets used regularly. A manual bolt, such as the ABH 1855S single manual bolt or the Ives FB358, is thrown and retracted by hand with a lever, which suits a pair where the inactive leaf is only opened occasionally to move equipment through.
8) What finishes does the Cal-Royal UNIFB540 come in?
Two: US1 flat black and US32D satin stainless steel. US32D is the one that matches most commercial hollow metal openings running satin stainless exit devices and push plates; US1 flat black is the choice when the pair is dark-finished storefront or painted-black wood. There is no brass or bronze option in this line, so if your other openings are US4 or US10B you'd be mixing finishes.
9) What else could I buy instead of the Cal-Royal UNIFB540 for an automatic pair?
A few directions depending on the opening. The Ives FB42 for wood doors is the closest match in concept, a top automatic flush bolt with an auxiliary fire latch. The Ives FB41 is an automatic flush bolt set for wood doors with a 3/4 inch throw, same throw as the Cal-Royal top bolt. The ABH 1860P/1862P is an automatic flush bolt pair with a thermal lock. If you need key control over the inactive leaf rather than automatic operation, that's a different family, the Adams Rite 1870 cylinder-operated flushbolt.
10) I manage a school and want one flush bolt part number across all my door pairs - does this one work?
That's the case for the UNIFB540. Because it is rated universal for both metal and wood doors, one part number covers mixed construction across a campus, which is the usual problem when classroom pairs are wood and corridor and mechanical pairs are hollow metal. It is a commercial-duty item built to ANSI/BHMA A156.3-2008 Type 25, and Cal-Royal lists it for educational facilities among other commercial settings. Pick one finish, US32D satin stainless or US1 flat black, and standardize on it.
11) What is a simpler flush bolt to use on a non-rated interior pair where the Cal-Royal UNIFB540 is more than we need?
For a straightforward manual bolt on an interior pair, the Trimco 3999 is a 6 inch corner mount flushbolt with a rounded end and the Trimco 3999SE is the same 6 inch corner mount with a square end; the Orca Hardware 86SQ is a 6 inch flush bolt with radius corners. These are edge-mount manual bolts without an automatic top unit. The Cal-Royal UNIFB540 is a coordinated two-piece assembly built to ANSI/BHMA A156.3-2008 Type 25 with a self-latching top bolt and a bottom fire latch, which is what you want when the pair is part of a rated or high-traffic commercial opening.
12) What is the difference between the Cal-Royal UNIFB540 and a manual flush bolt like the Ives FB358?
Operation is the dividing line. The Ives FB358 is a manual flush bolt with a 3/4 inch throw and a 1/2 inch bolt diameter, so the inactive leaf is thrown and retracted by hand at each use. The Cal-Royal UNIFB540 uses a self-latching top Auto Flush Bolt, which engages automatically as the inactive leaf closes, paired with a bottom Fire Latch Bolt. The two share a 3/4 inch bolt throw. Manual bolts suit inactive leaves that stay secured for long periods; automatic bolts suit pairs where the inactive leaf is opened regularly and staff cannot be relied on to re-throw it.
13) Is the ABH 1854 flush bolt set a substitute for the Cal-Royal UNIFB540?
They serve a similar opening but differ in how the bolt is worked and what doors they are specified for. The ABH 1854 Series is a manual flush bolt set with fire bolt for metal doors. The Cal-Royal UNIFB540 is an automatic top bolt combined with a bottom fire latch bolt and is built for both metal and wood doors. If your hardware schedule calls for automatic flush bolts on the inactive leaf, the manual set will not satisfy it; if the schedule says manual and the doors are hollow metal, the 1854 set is the match.
14) I need a single manual flush bolt for a metal door rather than the Cal-Royal UNIFB540 combination. What works?
The ABH 1855S is a manual flush bolt sold as a single for metal doors with a 3/4 inch throw, the same throw as the top bolt on the Cal-Royal UNIFB540. The Ives FB457 is a manual flush bolt for metal doors with a 12 inch rod length if the application calls for a longer rod reaching further up the leaf. The UNIFB540 differs in supplying both positions as a coordinated automatic-plus-fire-latch assembly, so it is the choice when the whole inactive leaf is being rehardwared rather than one bolt replaced.
How fast can I get the Cal-Royal UNIFB540-US1 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 Cal-Royal UNIFB540-US1 come with a warranty?
Absolutely. The Cal-Royal UNIFB540-US1 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 Cal-Royal UNIFB540-US1?
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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