Trimco 3999SE- Flushbolt - 6" ...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$16.80
$14.66
Trimco 3999SE- Flushbolt - 6" Corner Mount Square End

Trimco 3999SE- Flushbolt - 6" Corner Mount Square End

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Model: TRI-3999SE-626
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$16.80
$14.66
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3910 SERIES MANUAL FLUSH BOLTS OVERVIEW

Trimco’s 3910 Series Manual Flush Bolts offer products designed for use with wood or metal doors. With the only stainless steel finger in the industry, the 3900 Series Manual Flush Bolts are engineered for easy installation and long life. They are available in most architectural finishes and can be custom ordered for special applications. Custom rod lengths are also available.

 

FEATURES & BENEFITS

  • Body is manufactured from high density extrusion for greater durability
  • Stainless steel finger for high reliability and long life
  • Patented design for long life and easy installation
  • Positive spring action completely locks or unlocks throw

 

APPLICATIONS

  • Commercial & Industrial Buildings
  • Multifamily & Mixed-Use
  • Hospitality
  • Office Buildings

 

DOWNLOADS & RESOURCES

 

Manufacturer Resources

Product Specs

Series:
3999SE Series
Product Group:
Door Trim and Accessories
Product Subgroup:
Flush Bolts
Product Type:
Flush Bolts
Subcategory:
Surface, Barrel and Dutch Door Bolts
Commercial/Residential:
Commercial
Lock Type:
Flushbolt
Product Model:
3999SE
Product Category:
Door Trim and Accessories
Department:
Door Hardware

Trimco TRI-3999SE-626 – Frequently Asked Questions

1) Do I need one 3999SE or two for a pair of doors?
For a standard pair, the inactive leaf normally gets two bolts, one at the head and one at the sill, so plan on two units plus the strike at the frame head and a floor strike or dust proof strike at the threshold. The 3999SE is sold as a flush bolt, not a top-and-bottom set, so order the quantity your opening needs. Sets sold as a pair include the ABH 1854 manual flush bolt set and the Ives FB41 set.
2) My opening is a labeled fire door pair. Can I use the Trimco 3999SE on it?
Fire door pairs usually require bolts carrying a fire label, and often an auxiliary fire latch or fire bolt on the inactive leaf. Products in the comparable range built for that duty include the ABH 1854 manual flush bolt set with fire bolt for metal doors, the ABH 1858 universal bottom fire bolt, the Ives FB42 top automatic flush bolt with auxiliary fire latch, and the ABH 1860P/1862P automatic pair rated 3-hour with thermal lock. Match the bolt to the label on your door.
3) Square end or radius end flush bolt, which one do I order?
It's driven by the prep in the door, not preference. A square end face plate needs a square-cornered mortise, so the 3999SE drops into a square cut cleanly and looks wrong or leaves gaps in a radius cut. If your existing pocket has rounded corners, order a radius corner bolt such as the Orca Hardware 6 inch flush bolt with radius corners. New wood doors routed with a straight bit take the square end.
4) I need automatic flush bolts, not manual - what is the alternative to the Trimco 3999SE?
The Trimco 3999SE is a manual flush bolt, thrown and retracted by hand at the inactive leaf. For automatic operation, the Ives FB41 is an automatic flush bolt set for wood doors with 3/4 inch throw carrying a 90 minute fire rating, and the ABH 1860P/1862P is an automatic flush bolt pair rated 3 hour with a thermal lock. Automatic bolts retract when the active leaf opens, which is what most life-safety egress schedules require on a pair.
5) What is the closest 6 inch square end manual flush bolt to the Trimco 3999SE?
The Delaney 4108 is the closest match in form: it is a 6 inch square end solid brass flush bolt, the same nominal face length and end shape as the Trimco 3999SE 6 inch corner mount square end. The Trimco is built with a high density extruded body and a stainless steel finger, and comes in 605 bright brass, 606 satin brass, 613 oil rubbed bronze, 625 bright chrome and 626 satin chrome. If the door schedule calls out a 6 inch square end face plate, either will sit in the same mortise cut.
6) What should I use instead of the Trimco 3999SE if the inactive leaf has to be key controlled?
A corner mount manual flush bolt like the Trimco 3999SE is operated by hand at the door edge, so anyone at the leaf can throw it. Where the inactive leaf must be under key control, the Adams Rite 1870 is a cylinder-operated flushbolt with key control, and the Adams Rite 1877 is a cylinder-operated flushbolt for paired wood doors. Those take a cylinder and are operated from the face rather than the edge.
7) If I need a radius corner face plate instead of a square end, what flush bolt should I use?
The Orca Hardware 86SQ is a 6 inch flush bolt with radius corners, so it covers the same 6 inch length in a rounded corner face plate. The Trimco 3999SE is the square end version of that 6 inch corner mount format. Match the corner profile to the existing mortise pocket in the door edge so the plate seats flush without rework.
8) Does the Trimco 3999SE work on a fire rated pair, or do I need something else?
For a labeled pair, specify hardware that is stated as fire rated. The Ives FB358 manual flush bolt with 3/4 inch throw and 1/2 inch bolt diameter is listed as fire rated, and the ABH 1858 is a universal bottom fire bolt with manual operation intended to pair with a top bolt on rated openings. The ABH 1854 set includes a fire bolt for metal doors. The Trimco 3999SE 3910 Series manual flush bolts are specified for commercial and industrial buildings, multifamily and mixed-use, hospitality and office buildings on wood or metal doors.
9) Is this flush bolt heavy duty enough for a busy commercial entry pair?
It's a commercial-grade part. The body is a high density extrusion for durability, and the finger is stainless steel, which Trimco calls out as the only stainless steel finger in the industry, on a patented design aimed at long life. Trimco lists it for commercial and industrial buildings, multifamily and mixed use, hospitality and office buildings.
10) What's a close substitute for the Trimco 3999SE 6 inch square end flush bolt if I want a different brand?
Closest in form is the Delaney 6 inch square end solid brass flush bolt, same 6 inch face and square end. The Orca Hardware 6 inch flush bolt is the same length with radius corners rather than square, so the mortise cut and the look differ. The International Door Closers FB-1202 is also a square end bolt, with a 5/8 inch throw, 1/8 inch offset and 7/8 inch backset, if those numbers suit your prep.
11) What is the difference between the Trimco 3999SE and a two-point flushbolt like the Adams Rite MS1880?
The Trimco 3999SE is a single manual flush bolt, so a pair of doors needs one at the top and one at the bottom of the inactive leaf. The Adams Rite MS1880/MS1881 is a two-point flushbolt with an interlock mechanism, and the MS2180 is an auto-release two-point flushbolt with a Smartlock mechanism - both drive top and bottom from one operation. Two-point units are common on narrow stile aluminum pairs; the Trimco is a wood or metal door bolt.
12) I need a longer rod than the 6 inch Trimco 3999SE for a top bolt - what are my options?
For a longer reach, the Ives FB457 is a manual flush bolt with a 12 inch rod length for metal doors, and the Delaney 4363 is a 7 inch mortise extension flush bolt. Trimco's 3910 Series manual flush bolts are also available in custom rod lengths for special applications, so a 3999SE face plate can be specified with a longer rod rather than swapping brands.
13) Is there a decorative flush bolt alternative to the Trimco 3999SE for a residential style pair?
Emtek Flush Bolts are the decorative-leaning option in this family. The Trimco 3999SE is specified as commercial, with an extruded body and stainless steel finger, in 605 bright brass, 606 satin brass, 613 oil rubbed bronze, 625 bright chrome and 626 satin chrome, so it already covers standard architectural finishes if you need commercial construction with a brass or bronze look.
How fast can I get the Trimco TRI-3999SE-626 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 Trimco TRI-3999SE-626 come with a warranty?
Absolutely. The Trimco TRI-3999SE-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 Trimco TRI-3999SE-626?
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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