Don-Jo 1640 Flush Bolt 6" x 3/...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$21.26
$21.01
Don-Jo 1640 Flush Bolt 6" x 3/4" Cast Brass for Wood Doors

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

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Model: 1640-619
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$21.26
$21.01
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Don-Jo 1640 Flush Bolt 6" x 3/4" Cast Brass for Wood Doors

The Don-Jo 1640 Flush Bolt is a commercial-grade door hardware solution crafted from durable cast brass, measuring 6" in length and 3/4" in width for a clean, recessed installation. Designed exclusively for wood doors, this flush bolt features a 1" bolt throw and a 1/2" diameter bolt, delivering reliable latching performance in a low-profile form factor. Available in six finish options — 605, 609, 613, 619, 620, and 626 — the 1640 integrates seamlessly with a wide range of door hardware aesthetics. Compliant with ANSI L04201, it meets recognized industry standards for commercial door trim and accessory applications.

Key Features

  • Precise Dimensions: Measures 6" in length and 3/4" in width for a flush, recessed fit in standard wood door preparations.
  • 1" Bolt Throw: Provides a full 1" bolt throw for secure, positive latching engagement with the door frame strike.
  • 1/2" Diameter Bolt: Features a 1/2" diameter bolt for reliable holding strength in commercial door applications.
  • Cast Brass Construction: Manufactured from cast brass for long-lasting durability, corrosion resistance, and a premium finish quality.
  • Wood Door Compatibility: Specifically engineered for wood doors only, ensuring proper fit and reliable operation in compatible door assemblies.
  • Multiple Finish Options: Available in finishes 605, 609, 613, 619, 620, and 626 to coordinate with existing door hardware and architectural design requirements.
  • Commercial Grade: Rated for commercial applications as part of Don-Jo's Door Trim and Accessories product line, suitable for demanding institutional and commercial environments.

Certifications & Compliance

  • ANSI L04201 Compliant
  • Commercial Grade

Technical Specifications

  • Product Group: Door Trim and Accessories
  • Subcategory: Flush Bolts
  • 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
  • Educational Facilities
  • Healthcare Institutions
  • Retail Establishments
  • Multi-Tenant Residential Properties
  • Government and Municipal Buildings
  • Industrial and Warehouse Facilities

Why Don-Jo 1640?

Don-Jo 1640 Flush Bolts are built from cast brass to deliver professional-grade durability and a refined appearance in commercial door hardware installations. With a 1" bolt throw, 1/2" diameter bolt, and ANSI L04201 compliance, the 1640 is engineered to meet the performance demands of high-use commercial environments. Trust Don-Jo's commitment to quality craftsmanship for dependable, long-term performance in wood door applications.

Manufacturer Resources

DON-JO Bolts & Latches

Product Specs

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

Don-Jo 1640-619 – Frequently Asked Questions

1) Will the Don-Jo 1640 flush bolt work on a hollow metal door?
No. The 1640 is a wood door flush bolt only, and the mortise pocket it needs is cut into the edge of a wood stile. For a metal door, the ABH 1855S manual flush bolt or the Ives FB457 with a 12 inch rod are the metal door options. Trying to fit the 1640 into a hollow metal edge is not a mortise prep anyone should attempt.
2) How deep does the Don-Jo 1640 flush bolt throw into the head frame or threshold?
One inch of bolt throw, with a 1/2 inch diameter bolt. That full inch matters on a pair of doors where the top strike sits in the frame soffit and the bottom engages a floor strike, since a shallower throw can walk out of engagement as the inactive leaf flexes. Drill the strike hole for the 1/2 inch bolt plus clearance.
3) Do I need two Don-Jo 1640 flush bolts per door, or one?
Two per inactive leaf is the normal order, one at the head and one at the bottom, because the 1640 is a single manual bolt measuring 6 x 3/4 inches rather than a matched top-and-bottom set. Order the same finish for both so the exposed faces match. Both are hand operated, so someone has to physically slide each one.
4) Is the Don-Jo 1640 flush bolt approved for a fire rated wood door pair?
The 1640 is a standard manual flush bolt and carries no fire designation. Fire rated wood pairs need a bolt listed for that use plus, in most cases, an auxiliary fire latch on the top: the Ives FB42 top automatic flush bolt for wood doors includes an auxiliary fire latch, and the Ives FB41 automatic set for wood doors is listed at 90 minutes. Use one of those where the opening is rated.
5) What is the difference between the Don-Jo 1640 and an automatic flush bolt?
The Don-Jo 1640 is a manual flush bolt: the 1 inch throw bolt is thrown and retracted by hand at the bolt itself, so the inactive leaf stays bolted until someone goes to the door and releases it. An automatic flush bolt retracts when the active leaf opens - the Ives FB41 automatic flush bolt set for wood doors with 3/4 inch throw and the Ives FB42 top automatic flush bolt for wood doors both work that way, as does the ABH 1860P/1862P automatic flush bolt pair. Choose the 1640 where the inactive leaf is meant to stay fixed, and an automatic set where the inactive leaf has to free itself as part of normal egress.
6) What is the closest equivalent to the Don-Jo 1640 flush bolt from another manufacturer?
The Don-Jo 1640 is a 6 inch by 3/4 inch cast brass flush bolt with a 1 inch throw and a 1/2 inch diameter bolt. The nearest match in the same size is the Delaney 4108, a 6 inch square end solid brass flush bolt, which shares the 6 inch face plate length and brass construction. Two other 6 inch options are the Trimco 3999SE, a 6 inch corner mount square end flushbolt, and the Trimco 3999, the same 6 inch corner mount body with a rounded end. If the 1640's square 6 inch plate is what has to be matched in the existing door prep, the Delaney 4108 and the Trimco 3999SE keep the same plate length and end shape.
7) The doors are hollow metal, not wood - what flush bolt should be used instead of the Don-Jo 1640?
The Don-Jo 1640 is built for wood doors only, so a metal door opening needs a bolt prepped for metal. The ABH 1855S is a single manual flush bolt for metal doors with a 3/4 inch throw, and the ABH 1854 Series is a manual flush bolt set for metal doors that includes a fire bolt. The Ives FB457 is a manual flush bolt for metal doors supplied with a 12 inch rod length. Substituting one of these keeps the same manual flush bolt function while matching the door material.
8) Can the Don-Jo 1640 be used on a fire rated pair of doors?
The Don-Jo 1640 carries ANSI L04201 and is a commercial cast brass manual flush bolt; it is not offered as a fire bolt. For a fire rated wood pair, 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 supplied 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 of manual operation. Match the bolt to the label on the door assembly rather than carrying the 1640 onto a labeled opening.
9) Which flush bolt should be used if the inactive leaf needs to be key controlled?
The Don-Jo 1640 is operated at the bolt by hand and has no cylinder. Where the inactive leaf has to be released only by an authorized keyholder, the Adams Rite 1870 Series is a cylinder-operated flushbolt with key control, and the Adams Rite 1877 is a cylinder-operated flushbolt for paired wood doors - the 1877 being the one prepped for a wood pair like the openings the 1640 serves. Adams Rite also offers two-point flushbolts, the MS1880/MS1881 with an interlock mechanism and the MS2180 Series auto-release two-point flushbolt with a Smartlock mechanism, which throw top and bottom together from one operation.
10) What looks like a substitute for the Don-Jo 1640 but will not drop into the same prep?
Several flush bolts share the description but not the prep. The Trimco 3999 and 3999SE are 6 inch corner mount flushbolts - corner mount sits on the edge and face at the corner of the leaf rather than in a straight edge mortise like the 1640. The International Door Closers FB-1202 is a square end bolt with a positive U joint actuator built to a 1/8 inch offset with a 7/8 inch backset and supplied with a guide, so the backset has to be verified against the door. The Orca Hardware 86SQ is a 6 inch flush bolt with radius corners, which will not fill a square cornered 6 inch mortise. Matching length alone is not enough - end shape, corner treatment, and backset all have to agree with the existing cut.
11) What does ANSI L04201 mean on a flush bolt?
L04201 is the ANSI/BHMA function designation the 1640 is built to, the number architects and MRO specifiers write on a hardware schedule for a manual flush bolt. If your spec sheet calls out L04201, the 1640 answers it directly, which is the usual reason it gets picked for institutional work over an unclassified bolt.
12) What finishes does the Don-Jo 1640 come in, and will it match my existing brass door hardware?
Six finishes: 605 polished brass, 609 antique brass, 613 oil rubbed bronze, 619 satin nickel, 620 antique nickel, and 626 satin chrome. For a building already on polished brass lever sets, 605 is the match; 626 satin chrome pairs with the 626 levers and closers common in schools and offices. The body is cast brass, so the plated finish sits on solid brass rather than steel.
13) I need a key operated flush bolt so tenants cannot release the inactive leaf. Is the Don-Jo 1640 that?
No. The 1640 is a hand slid bolt with no cylinder, so anyone who can reach the door edge can retract it. For key control on the inactive leaf, the Adams Rite 1877 is a cylinder operated flushbolt for paired wood doors, and the Adams Rite 1870 Series is the cylinder operated flushbolt line with key control.
14) Can I use the Don-Jo 1640 to replace a worn flush bolt without recutting the door?
Depends on the existing pocket. The 1640 needs a mortise sized for a 6 inch long, 3/4 inch wide face with a 1/2 inch bolt behind it. If the old bolt shares that footprint the swap is a faceplate change; if the existing one is a 7 inch mortise type, the pocket is longer than the 1640 covers and you would want a 7 inch replacement instead, such as the Delaney 7 inch slide type mortise flush bolt.
15) Is there a longer flush bolt than the Don-Jo 1640 for a taller door?
The Don-Jo 1640 face plate is 6 inches long. Where a longer mortise is wanted, the Delaney 4101 is a 7 inch slide type mortise-in flush bolt and the Delaney 4363 is a 7 inch mortise extension flush bolt. For a metal door needing reach to the head, the Ives FB457 manual flush bolt is supplied with a 12 inch rod length. Face plate length drives the mortise cut, so confirm the prep in the door before moving between a 6 inch and a 7 inch body.
16) How does the Don-Jo 1640 bolt throw compare to other manual flush bolts?
The Don-Jo 1640 throws a full 1 inch with a 1/2 inch diameter bolt. Among the manual comparables, the Ives FB358 throws 3/4 inch on the same 1/2 inch bolt diameter, the ABH 1855S single for metal doors throws 3/4 inch, and the International Door Closers FB-1202 throws 5/8 inch with a 1/8 inch offset and 7/8 inch backset. Throw determines how deep the bolt sits in the strike at the head or in the floor, so the depth of the existing strike prep decides which of these drops in.
17) Is a cast brass flush bolt worth it over a stamped one for high traffic doors?
Cast brass gives you a solid bolt body and faceplate that resists deformation from repeated hand operation and does not corrode the way plated steel does in a damp entry or a pool corridor. On a door the housekeeping staff throws twice a day, that is the part that survives. The 1640 is built for commercial use rather than light residential duty.
How fast can I get the Don-Jo 1640-619 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 Don-Jo 1640-619 come with a warranty?
Absolutely. The Don-Jo 1640-619 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 1640-619?
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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