Don-Jo 1640R Flush Bolt 6" x 3...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$16.89
Don-Jo 1640R Flush Bolt 6" x 3/4" Cast Brass for Wood Doors

Don-Jo 1640R Flush Bolt 6" x 3/4" Cast Brass for Wood Doors

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Model: 1640R-626
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In Stock (leaves warehouse same day if ordered before 3pm ET)

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Don-Jo 1640R Flush Bolt 6" x 3/4" Cast Brass for Wood Doors

The Don-Jo 1640R is a heavy-duty cast brass flush bolt measuring 6" in length and 3/4" in width, engineered exclusively for wood door applications. Featuring a 1" bolt throw and a 1/2" diameter bolt with a 3/4" radius end, this flush bolt delivers reliable door security and smooth operation in commercial settings. Compliant with ANSI L04201, the 1640R is available in six finishes—605, 609, 613, 619, 620, and 626—to coordinate with a wide range of door hardware configurations.

Key Features

  • Precise Dimensions: Measures 6" in length and 3/4" in width, providing a low-profile, flush-mounted solution ideal for paired wood door installations.
  • 1" Bolt Throw: Delivers a full 1" bolt throw for secure door retention and reliable latching performance in commercial applications.
  • 1/2" Diameter Bolt: Features a 1/2" diameter bolt for consistent engagement and dependable hold in high-use environments.
  • 3/4" Radius End: Smooth 3/4" radius end design ensures clean aesthetics and easy bolt operation without sharp edges.
  • Cast Brass Construction: Manufactured from cast brass for exceptional durability, corrosion resistance, and long-term performance in commercial door hardware applications.
  • Wood Door Compatibility: Specifically designed for wood doors only, ensuring proper fit and optimal performance in the intended application.
  • Multiple Finish Options: Available in finishes 605, 609, 613, 619, 620, and 626 to match existing door hardware and architectural requirements.
  • ANSI Compliance: Meets ANSI L04201 standards, confirming suitability for commercial-grade door hardware installations.

Certifications & Compliance

  • ANSI L04201 Compliant
  • Commercial Grade

Technical Specifications

  • Subcategory: Flush Bolts
  • Product Group: Door Trim and Accessories
  • Product Subgroup: Flush Bolts
  • Product Type: Flush Bolts
  • Commercial/Residential: Commercial
  • Bolt Throw: 1"
  • Product Category: Door Trim and Accessories
  • Department: Door Hardware

Typical Applications

  • Commercial Office Buildings with Paired Wood Doors
  • Educational Facilities and Classroom Entries
  • Healthcare Institutions with Double-Door Configurations
  • Retail Establishments Requiring Inactive Leaf Security
  • Government and Municipal Buildings
  • Multi-Tenant Residential Properties with Wood Door Pairs
  • Hospitality and Hotel Corridor Doors

Why Don-Jo 1640R?

Don-Jo flush bolt products are built to commercial-grade standards, with the 1640R crafted from cast brass to deliver lasting corrosion resistance and structural integrity in demanding door hardware applications. The ANSI L04201-compliant design, combined with a 1" bolt throw and 1/2" diameter bolt, ensures dependable performance on wood door installations where consistent, secure operation is essential.

Manufacturer Resources

DON-JO Bolts & Latches

Product Specs

Subcategory:
Flush Bolts
Product Group:
Door Trim and Accessories
Product Subgroup:
Flush Bolts
Product Type:
Flush Bolts
Commercial/Residential:
Commercial
Bolt Throw:
1"
ANSI/BHMA:
L04201
Product Model:
1640R
Product Category:
Door Trim and Accessories
Product Substrate:
Cast Brass
Department:
Door Hardware

Don-Jo 1640R-626 – Frequently Asked Questions

1) How much bolt engagement does the Don-Jo 1640R give into the header or threshold strike?
A full 1 inch throw, with a 1/2 inch diameter bolt and a 3/4 inch radius end. That is deeper engagement than a lot of manual flush bolts give you: the Ives FB358 manual bolt and the ABH 1855S are both 3/4 inch throw, and the IDC FB-1202 is 5/8 inch. If you are drilling fresh strike holes in a wood head or a threshold, plan the depth around the 1 inch throw plus clearance.
2) Is the Don-Jo 1640R manual or automatic, and which do I want on a pair of wood doors?
Manual. Someone has to flip the lever on the inactive leaf by hand to throw and retract the bolt, which suits an inactive leaf that stays shut most of the time (a storeroom pair, a retail back door, a corridor pair that only opens for deliveries). If the inactive leaf gets opened often, or the door pair is on an egress path where the inactive leaf has to release when the active leaf opens, use an automatic set instead, such as the Ives FB41 automatic flush bolt set for wood doors.
3) How much door edge do I need to mortise in a Don-Jo 1640R?
The face plate is 6 inches by 3/4 inch, so you are cutting a 3/4 inch wide mortise up the edge of the inactive leaf, six inches long, deep enough to take the bolt case behind it. A standard 1-3/4 inch commercial wood door edge takes that 3/4 inch face without trouble. On a narrow stile or a glass-lite wood door where the stile is thin, check the edge before you cut.
4) Will a Don-Jo 1640R drop into the mortise left by an old flush bolt I am replacing?
Only if the old bolt had the same 6 inch by 3/4 inch face and a compatible case depth. Pull the existing bolt, measure the face plate and the mortise width first. A 6 inch rounded-end bolt swaps cleanly for another 6 inch rounded-end bolt; a 7 inch bolt like the Delaney 4101 slide type mortise leaves a longer pocket the 1640R will not cover. Also check the head and sill strike depth, because the 1640R throws a full inch.
5) The Don-Jo 1640R is for wood doors - what flush bolt do I use on a hollow metal pair?
The 1640R is engineered for wood doors only, so on a hollow metal pair you want a bolt built for metal. The ABH 1855S is a manual flush bolt single for metal doors with a 3/4 inch throw, the ABH 1854 Series is a manual flush bolt set with a fire bolt for metal doors, and the Ives FB457 is a manual flush bolt with a 12 inch rod length for metal doors. The throw differs: the 1640R gives a 1 inch bolt throw, while the ABH 1855S and the Ives FB358 are 3/4 inch throw, which changes how deep the strike pocket in the head or threshold needs to be.
6) My inactive leaf on a wood pair is on a fire rated opening - can I use the Don-Jo 1640R?
The 1640R is a manual cast brass flush bolt meeting ANSI L04201 for commercial wood door pairs. For a wood pair where the opening requires a fire rated bolt, the Ives FB41 is an automatic flush bolt set for wood doors with a 3/4 inch throw carrying a 90 minute fire rating, and the Ives FB42 is a top automatic flush bolt for wood doors with an auxiliary fire latch. On metal pairs the ABH 1860P/1862P automatic flush bolt pair is fire rated 3 hour with a thermal lock, and the ABH 1858 is a universal bottom fire bolt. Confirm the label on the door leaf against the bolt you specify before ordering.
7) What is the closest cast brass 6 inch flush bolt to the Don-Jo 1640R if I need a square end instead of a rounded one?
The 1640R is a 6 inch cast brass flush bolt with a 3/4 inch radius end, so the bolt face is rounded. For a square-end face on the same 6 inch length, the Trimco 3999SE is a 6 inch corner mount flush bolt with a square end, and the Delaney 4108xx is a 6 inch square end solid brass flush bolt. If you want to stay with a rounded end from another maker, the Trimco 3999 is a 6 inch corner mount rounded end flush bolt and the Orca Hardware 86SQ is a 6 inch flush bolt with radius corners. Match the end shape to the mortise already cut in the door edge - a square pocket will show a gap around a radius end face.
8) I need to control the inactive leaf with a key, not a thumb slide - what replaces the Don-Jo 1640R?
The 1640R is thrown by hand at the door edge, with no cylinder. 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. Where the inactive leaf needs both a top and bottom bolt driven together, the Adams Rite MS1880/MS1881 are two-point flushbolts with an interlock mechanism, and the MS2180 Series is an auto-release two-point flushbolt with a Smartlock mechanism. Cylinder-operated bolts add a keyway to the opening, so plan the keying with the rest of the door group.
9) What does ANSI L04201 mean on a flush bolt, and does the Don-Jo 1640R meet it?
The 1640R is built to ANSI L04201, the ANSI/BHMA function designation for a manual flush bolt used on the inactive leaf of a pair. Institutional specs and door hardware schedules often call the bolt out by that function code rather than a part number, so if your drawing says L04201 on a wood pair, this cast brass bolt answers the callout.
10) Do I need one Don-Jo 1640R or two for a pair of doors?
Two per inactive leaf if you want the leaf held top and bottom, which is the normal commercial install: one bolt into the frame head, one into the threshold or floor. The 1640R is sold as a single bolt, so order in pairs per opening. You will also need strikes or drilled holes at head and sill to take the 1 inch throw.
11) What finishes does the Don-Jo 1640R flush bolt come in, and can I match the rest of my door hardware?
Seven finishes: 605 polished brass, 609 antique brass, 613 oil rubbed bronze, 619 satin nickel, 620 antique nickel, 625 polished chrome, and 626 satin chrome. Those are standard BHMA finish numbers, so if your levers and hinges are specified as 626 or 613 the bolt matches the schedule without an eyeball guess. For fleets of wood door pairs across a building, spec the same finish number you already carry.
12) Can the Don-Jo 1640R be locked or released with a key from outside?
No, it is a lever-operated manual bolt, thrown and retracted by hand at the leaf. If you need key control over the inactive leaf, the Adams Rite 1877 is a cylinder-operated flushbolt made for paired wood doors, and the Adams Rite 1870 Series is the cylinder-operated flushbolt with key control.
13) Do I have to reach the bolt by hand with the Don-Jo 1640R, or is there a version that throws itself?
The 1640R is a manually operated flush bolt - someone slides the bolt at the door edge to throw and retract it. If you want the inactive leaf to secure itself when the doors close, the Ives FB41 is an automatic flush bolt set for wood doors and the Ives FB42 is a top automatic flush bolt for wood doors with an auxiliary fire latch. On metal doors the ABH 1860P/1862P is an automatic flush bolt pair. Automatic bolts throw when the active leaf closes against them, which matters on openings where staff will not reliably stoop to a bottom bolt.
14) What is the difference between the Don-Jo 1640R and a 7 inch mortise flush bolt?
The 1640R has a 6 inch by 3/4 inch face, so the mortise in the door edge is cut for a 6 inch plate. The Delaney 4101xx is a 7 inch slide type mortise-in flush bolt and the Delaney 4363xx is a 7 inch mortise extension flush bolt - both need a longer pocket routed into the edge of the leaf. If you are replacing an existing bolt, measure the plate already in the door before choosing between a 6 inch and a 7 inch body, since a shorter plate will not cover a pocket cut for a longer one.
15) Is the International Door Closers FB-1202 a drop-in swap for the Don-Jo 1640R?
No - the two throw different distances. The 1640R gives a 1 inch bolt throw with a 1/2 inch diameter bolt and a 3/4 inch radius end. The International Door Closers FB-1202 is a square end flush bolt with a positive U joint actuator, a 5/8 inch throw, and a 1/8 inch offset with a 7/8 inch backset. The shorter throw and the square face mean a different strike engagement and a different pocket shape, so treat it as a different bolt rather than a like-for-like replacement.
16) Which flush bolts give a longer throw than the Ives FB358 for a wood pair?
The Ives FB358 is a manual flush bolt with a 3/4 inch throw and a 1/2 inch bolt diameter, and the ABH 1855S single for metal doors is also a 3/4 inch throw. The Don-Jo 1640R uses the same 1/2 inch bolt diameter but throws a full 1 inch, in a 6 inch by 3/4 inch cast brass body for wood doors. A longer throw seats deeper into the head strike or floor, which is worth checking where the pair sees heavy traffic and the leaves can flex.
17) Is a cast brass flush bolt worth it over a stamped one for high traffic doors?
Cast brass is the point of the 1640R. The body is cast rather than formed sheet, which is what you want on a classroom pair or a hotel corridor pair where the bolt gets worked and the finish gets handled. It is a commercial-grade part, not a residential one. If you want another solid brass option in a 6 inch bolt, the Delaney 4108 6 inch square end solid brass flush bolt is the square-end alternative.
18) I need flush bolts that match residential-style decorative wood doors rather than commercial hardware - what else is there besides the Don-Jo 1640R?
The 1640R is a commercial-grade cast brass bolt offered in 605 polished brass, 609 antique brass, 613 oil rubbed bronze, 619 satin nickel, 620 antique nickel, 625 polished chrome, and 626 satin chrome. If the opening calls for a decorative-line bolt instead, Emtek flush bolts and the Delaney 4108xx 6 inch square end solid brass flush bolt are the alternatives in that vein. The trade-off is that the 1640R carries an ANSI L04201 commercial designation, which is often what a facility spec asks for on a corridor or classroom pair.
How fast can I get the Don-Jo 1640R-626 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 Don-Jo 1640R-626 come with a warranty?
Absolutely. The Don-Jo 1640R-626 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 Don-Jo 1640R-626?
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