Von Duprin 24090128 Series 49 ...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$414.00
$260.00
Von Duprin 24090128 Series 49 Bottom Latch Assembly replacement part for 33A/35/98/99 Series exit devices, showing latch mechanism and mounting bracket components

Von Duprin 24090128 Series 49 Bottom Latch Assembly Replacement Part for 33A/35/98/99 Series Exit Devices

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Model: 24090128
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$260.00
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Von Duprin 24090128 Series 49 Bottom Latch Assembly

The Von Duprin 24090128 is the Series 49 Bottom Latch Assembly - a genuine OEM replacement component for vertical rod and concealed vertical rod exit devices in the 33A, 3549A, 98, and 9949 Series. It restores the bottom latching function that keeps the inactive leaf or bottom rod engaged when the device is in the latched position. Direct drop-in replacement; no modification required when fitted to a compatible device.

Compatible Exit Device Series

  • Von Duprin 33A Series
  • Von Duprin 3549A Series
  • Von Duprin 98 Series
  • Von Duprin 9949 Series

Verify your device model and series before ordering. Consult the Von Duprin 98/99 Series catalog (linked below) for exploded parts diagrams and part-number cross-references.

Technical Specifications

  • Part Number: 24090128
  • Assembly: Series 49 Bottom Latch Assembly
  • Grade: Grade 1 Commercial
  • Type: Replacement Part
  • Application: Commercial
  • Compatible Series: 33/35/98/99 Series exit devices

Typical Applications

  • Commercial office and institutional buildings
  • Healthcare and education facilities
  • Government and municipal buildings
  • Multi-family and mixed-use properties
  • Industrial and warehouse facilities

Manufacturer Resources

Von Duprin 98/99 Series Catalog

Product Specs

Product Group:
Exit Devices and Trim
Series:
33/35/98/99 Series
Grade:
Grade 1
Product Subgroup:
Parts and Accessories
Subcategory:
Parts and Accessories
Product Type:
Exit Devices Parts
Commercial/Residential:
Commercial
Parts and Accessories Type:
Replacement Parts
Product Attribute:
Parts and Accessories
Fire Rating:
No
Product Category:
Exit Devices and Trim
Department:
Door Hardware

Von Duprin 24090128 – Frequently Asked Questions

1) Will the Von Duprin 24090128 bottom latch fit my 98 or 9949 exit device?
The 24090128 Series 49 bottom latch assembly is made for Von Duprin 33A, 3549A, 98, and 9949 Series devices. On those it drops in with no modification to the device or the door. What it will not do is cross into other Von Duprin families or other brands, so pull the model off the device chassis label first. If your device is a rim or a mortise unit with no bottom rod, this part does not apply at all.
2) Can I use the Von Duprin 24090128 on a fire rated exit device?
No. The Series 49 bottom latch assembly carries no fire rating, so it should not go into a labeled fire door opening. Fire rated vertical rod devices use fire latch components matched to the label, and swapping in an unrated part voids the assembly. For a non-rated pair of doors on a stairwell, corridor, or exterior opening, it is the correct part.
3) What is the equivalent part when the exit device needs a top latch instead of a bottom latch?
The Von Duprin 24090128 is the Series 49 Bottom Latch Assembly and restores the bottom latching point on 33A, 3549A, 98, and 9949 Series vertical rod and concealed vertical rod devices. It does not serve the top latching point. For a top latch on an Accentra device, the 60-7010-0049-999 is the top latch replacement component for the Accentra 7110/7120 exit device, and the 60-7010-0050-999 is the top latch replacement component for the Accentra 7110F. Top and bottom latching points are separate components on a vertical rod device, so confirm which end of the door is failing to latch before ordering.
4) Is the 24090128 the right part if the vertical rod itself is bent or damaged rather than the latch?
No. The Von Duprin 24090128 is the Series 49 Bottom Latch Assembly - the latching mechanism and mounting bracket, not the rod that drives it. A damaged rod is a separate component; on a Falcon device, for example, the 610061 is the 24 Series Monarch concealed vertical top rod for F-25-C and F-25-CWDC exit devices. Rods and latch assemblies are ordered separately and are not interchangeable between brands, so match the rod to the device series it came out of and use the 24090128 only for the bottom latch itself on a 33A, 3549A, 98, or 9949 Series device.
5) What does the bottom latch on a vertical rod exit device actually do, and why replace it?
On a vertical rod device the bottom latch is what drops into the threshold strike and holds the leaf at the floor. When it wears or the bolt stops retracting, the door drags, fails to latch, or the leaf rattles. The 24090128 Series 49 assembly restores that bottom latching function on 33A, 3549A, 98, and 9949 devices. It is a genuine OEM part, so the rest of the device stays as it was built.
6) Is the Von Duprin 24090128 rated for high traffic commercial use?
Grade 1 commercial is the rating on the 24090128 bottom latch assembly, which is the heaviest duty tier in the standard and what a school, hospital, or municipal building spec normally calls for. It is a commercial part, not a residential one, so it suits the traffic on a main egress pair rather than a light interior door.
7) I need a top latch, not a bottom latch, for an exit device. What should I look at?
The 24090128 is the bottom latch only, the one at the threshold. For a top latch you are looking at a different component entirely. In other brands ZenSupply stocks top latch replacement components for the Accentra 7110/7120 and for the 7110F. Neither is interchangeable with Von Duprin hardware, so match the replacement to the device already on the door.
8) My exit device has a concealed vertical rod. Is a bottom latch replacement still the right fix?
Yes, on the covered families. The Series 49 assembly serves both surface vertical rod and concealed vertical rod devices in the 33A, 3549A, 98, and 9949 Series. On a concealed rod device you will be opening the door stile to reach it, so plan the labor accordingly. If the rod itself is bent or the wrong length, the latch is not your problem and you need the rod instead.
9) I have a pair of doors with no mullion. Do I need a bottom latch part or something else?
A vertical rod device latches at the head and the floor, which is how a pair stays secure without a center mullion, and the 24090128 is the floor half of that on 33A, 3549A, 98, and 9949 devices. If instead you are running rim devices on the pair, you need a mullion rather than a latch part. ZenSupply carries the Falcon 4023 steel mullion for double door exit device applications, and Falcon 525 aluminum mullion stabilizers.
10) Will a Falcon exit device part work as a substitute for the Von Duprin 24090128?
No. Falcon exit device components are built to Falcon geometry, and the parts ZenSupply stocks on that side are for different devices entirely, such as the 610061 concealed vertical top rod for the 24 Series Monarch F-25-C and F-25-CWDC, and the T Series 2-3/8 inch square corner deadlatch. None of those interchange with a Von Duprin 33A, 3549A, 98, or 9949 device. Stay with the OEM assembly for those.
11) Can a mullion be used instead of replacing the bottom latch on a pair of doors?
They solve different problems. The Von Duprin 24090128 restores bottom latching on an existing 33A, 3549A, 98, or 9949 Series vertical rod device, keeping the leaf engaged when the device is latched. A mullion is a separate vertical member between a pair of doors that gives rim devices something to latch into - the Falcon 4023 is a steel mullion for double door exit device applications, and the Falcon 525 aluminum mullion stabilizers are accessories for exit device openings. Converting a vertical rod pair to a mullion and rim devices is a different opening design, not a repair; if the existing vertical rod devices are staying, the bottom latch assembly is the part that returns the opening to service.
12) Will a deadlatch replacement part work in place of the Von Duprin bottom latch assembly?
No. The Von Duprin 24090128 Series 49 Bottom Latch Assembly is a bottom latching component for vertical rod and concealed vertical rod exit devices in the 33A, 3549A, 98, and 9949 Series. A deadlatch part such as the Falcon T Series 2-3/8 inch square corner deadlatch replacement is a latch for a T Series device and is dimensioned to that prep. The two are not cross-compatible, and the 24090128 drops into a compatible Von Duprin device without modification precisely because it is matched to that device family.
13) For a facility standardizing on Grade 1 exit hardware, how does the 24090128 compare to the Accentra latch components on rating?
The Von Duprin 24090128 Series 49 Bottom Latch Assembly is a Grade 1 commercial part and is not fire rated. The Accentra 60-7010-0049-999 and 60-7010-0050-999 top latch replacement components are likewise not fire rated. All three are non-fire-rated repair components, so an opening with a fire label requires the device and parts specified for that label rather than any of these.
14) How do I confirm the right Von Duprin exit device part number before I order?
Von Duprin publishes exploded parts diagrams and part number cross references in the 98/99 Series catalog, and that is the reliable way to confirm 24090128 is the assembly on your device. Read the series off the chassis label, find your device in the diagram, and match the callout. Devices in the field are often decades old and have been rebuilt, so the label beats what the drawings say.
15) Is the Von Duprin 24090128 a genuine OEM part or an aftermarket copy?
Genuine OEM. The Series 49 bottom latch assembly is the Von Duprin replacement component for its own 33A, 3549A, 98, and 9949 devices, which matters when a facility standardizes on one device family and wants every rebuild to leave the hardware as originally specified.
How fast can I get the Von Duprin 24090128 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 Von Duprin 24090128 come with a warranty?
Absolutely. The Von Duprin 24090128 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 Von Duprin 24090128?
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
Why buy the Von Duprin 24090128 from ZenSupply?
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