Von Duprin 990NL Night Latch T...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$403.00
$265.98
Von Duprin Von Duprin 990NL Night Latch Trim for 98/99 Series Exit Devices VON-990NL

Von Duprin 990NL Night Latch Trim for 98/99 Series Exit Devices

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Model: 990NL-R/V 26D
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$403.00
$265.98
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98/99 Trim FunctionsVon Duprin protects your investment by empowering you to adapt with flexible solutions and modular options. The 98/99 Series features numerous trim options to serve your different needs. Designed with flexibility in mind, our solutions offer ease of adding new options as they are developed. With Von Duprin, you can be confident that as the needs of your facility change, our products can be upgraded easily to meet your needs, especially as the mechanical and electronic technology converge. Von Duprin’s versatile design enables you to add functionality to existing devices in a cost-effective way, protecting your investment well into the future.SpecificationsSpecifications and certifications are specific to each configuration. See the 98/99 Series catalogs for more information.
  • ANSI/BHMA A156.3 2014 Grade 1 certified
  • ANSI/UL 10C (fire-rated only)
  • ANSI/UL 305
  • CAN/ULC-S104 (fire-rated only)
  • CAN/ULC-S132

Functions & Trim A variety of functions and trim options are available, but only the standard options are listed below. Refer to the 98/99 Series catalog for more information. Functions
  • Classroom: the key locks and unlocks the lever or knob
  • Dummy: the rigid mechanical trim for pull operation
  • Exit only: no outside trim
  • Passage: the lever or knob is always active
  • Storeroom: the key retracts the latchbolt, the lever or knob is rigid

98/99 Series Popular Trims
  • 990: pull trim, 5 standard functions:
    • Classroom (TP)
    • Storeroom (NL)
    • Dummy trim (DT)
    • Passage (TP-BE)
    • Exit only (EO)

  • 996: lever or knob trim, 4 standard functions:
    • Classroom (L, K)
    • Storeroom (L-NL, K-NL)
    • Dummy (L-DT, K-DT)
    • Passage (L-BE, K-BE)


RESOURCES & DOWNLOADS 98/99 Series Catalog

Manufacturer Resources

Product Specs

Series:
98 & 99 Series
Grade:
Grade 1
Duty Level:
Heavy Duty
Product Group:
Exit Devices and Trim
Product Subgroup:
Exit Device Trim
Product Type:
Exit Device Trim
Subcategory:
Exit Device Trim
Commercial/Residential:
Commercial
Product Model:
990NL
(CTC) Center-to-Center:
5-1/2"
Product Function:
Night Latch
Door Hand Direction:
Non-Handed
Trim Hardware:
Night Latch
Product Category:
Exit Devices and Trim
Department:
Door Hardware

Von Duprin 990NL-R/V 26D – Frequently Asked Questions

1) What is the Von Duprin 990NL night latch used for?
The 990NL night latch provides nighttime security for Von Duprin 98/99 series exit devices. It prevents outside access while maintaining interior egress capability. The night latch locks the outside lever or thumb piece to secure the door after hours.
2) Which Von Duprin exit devices is the 990NL compatible with?
The 990NL night latch is designed specifically for Von Duprin 98 and 99 series exit devices. It works with both 98 rim devices and 99 mortise devices. Verify your exit device series before ordering to ensure proper compatibility.
3) Does the 990NL night latch affect door handing?
The 990NL is field reversible for right hand or left hand doors. The night latch can be configured during installation to match your specific door handing. No separate left or right hand models are required.
4) What finishes are available for the 990NL night latch?
The 990NL typically comes in standard Von Duprin finishes including 613 oil rubbed bronze, 626 satin chrome, and 628 satin aluminum. Verify finish availability with your specific exit device finish for proper matching.
5) Does the 990NL night latch require power or special wiring?
The 990NL is a mechanical night latch that requires no electrical power or wiring. It operates through manual key control from the outside and thumb turn operation from the inside. This makes installation simpler with no electrical connections needed.
6) Are there building code considerations for the 990NL night latch?
Night latches must comply with egress requirements in your local building code. The 990NL maintains single motion egress from the inside while providing security from outside. Verify code compliance for your specific application and occupancy type.
7) What components are included with the 990NL night latch?
The 990NL typically includes the night latch mechanism, mounting hardware, and installation instructions. Keys and cylinders may be ordered separately depending on your keying requirements. Check the complete parts list for your specific configuration.
8) How is the 990NL night latch installed on exit devices?
The 990NL mounts to the exit device trim using the provided hardware. Installation requires basic mechanical skills and standard tools. Follow the manufacturer installation template and instructions for proper alignment and operation.
9) How do you maintain and adjust the 990NL night latch?
Regular maintenance includes lubricating the mechanism with appropriate lock lubricant and checking operation. The latch should engage and disengage smoothly with key operation. Adjust mounting if the latch binds or fails to fully engage.
10) What other Von Duprin night latch models are available?
Von Duprin offers various night latch options for different exit device series. The 996L works with other device models. Browse our Von Duprin collection for compatible night latches and exit device accessories.
11) Can the 990NL be used in high traffic applications?
The 990NL is built for commercial grade applications and can handle regular use. For extremely high traffic situations, consider the duty rating of your complete exit device system. Heavy use may require more frequent maintenance and inspection.
12) What are the key measurements for the 990NL night latch?
The 990NL is sized to work with standard Von Duprin 98/99 series trim dimensions. Verify door thickness and trim compatibility before installation. Consult the manufacturer specifications for exact measurements and clearance requirements.
How fast can I get the Von Duprin 990NL-R/V 26D 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 990NL-R/V 26D come with a warranty?
Absolutely. The Von Duprin 990NL-R/V 26D 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 990NL-R/V 26D?
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 990NL-R/V 26D from ZenSupply?
ZenSupply makes it easy to get the commercial door hardware you need—fast shipping, expert support, and rewards on every order. Our team is always ready to help you choose the right product for your project.

Product Reviews

  • 5
    Trim Handle

    Posted by Terry Helms on Aug 21st 2025

    Handle arrived on time.

!