Von Duprin 880K-NL Night Latch...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$524.00
$377.63
Von Duprin 880K-NL Knob, Night Latch, Function, Trim for 88 Series Exit Devices

Von Duprin 880K-NL Night Latch Knob Exit Device Trim for 88 Series, Heavy Duty Grade 1, Non-Handed

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Model: 880K-NL-R US10B
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$377.63
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Von Duprin 880K-NL Night Latch Knob Exit Device Trim for 88 Series, Heavy Duty Grade 1, Non-Handed

Professional Night Latch Knob Trim for 88 Series Wide-Style Exit Devices

The Von Duprin 880K-NL is a heavy-duty Grade 1 Night Latch Knob Exit Device Trim engineered for use with the Von Duprin 88 Series exit devices. The 88 Series is a wide-style crossbar device available in Rim, Surface Mounted Vertical Rod, Concealed Vertical Rod, and Mortise configurations, supporting both panic and fire rated applications. Constructed from heavy 10 gauge (2.4 mm) brass, bronze, or stainless steel, the 880 Series trim delivers exceptional durability and a 2 3/4" (70 mm) projection. The non-handed design and flexible field sizing make this trim a versatile solution for commercial door hardware installations.

Professional Features & Benefits

  • Night Latch Function: Knob, Night Latch (880K-NL) function provides controlled entry while maintaining compliant egress through the 88 Series exit device.
  • Heavy-Duty Construction: Fabricated from heavy 10 gauge (2.4 mm) brass, bronze, or stainless steel for long-lasting performance in demanding commercial environments.
  • Non-Handed Design: Universal non-handed configuration simplifies specification, ordering, and installation across a wide range of door applications.
  • Product Projection: 2 3/4" (70 mm) projection provides ergonomic knob placement and clearance for smooth, reliable operation.
  • Rim Center Line Dimensions: A 39 13/16" (1011 mm) and B 36 13/16" (935 mm) rim center line measurements ensure precise alignment with compatible 88 Series exit devices.
  • 88 Series Compatibility: Designed exclusively for use with 88 Series exit devices, available in Rim, Surface Mounted Vertical Rod, Concealed Vertical Rod, and Mortise configurations for panic and fire rated applications.
  • Available Trim Functions: The 880 Series trim line includes 880DT, 880K, 880NL, and 880TP functions, with an optional 880EO exit only trim plate also available. To order with the exit device, specify 88EOx880EO.
  • Grade 1 Heavy Duty Rating: Meets Grade 1 Heavy Duty standards for commercial applications requiring the highest level of performance and reliability.

Technical Specifications

  • Subcategory: Exit Device Trim
  • Series: 88 Exit Trim
  • Grade: Grade 1
  • Duty Level: Heavy Duty
  • Compatibilty: 88 Series Exit Devices
  • Product Group: Exit Devices and Trim
  • Product Subgroup: Exit Device Trim
  • Product Type: Exit Device Trim
  • Commercial/Residential: Commercial
  • Rim Center Line: A 39 13/16 (1011 mm) B 36 13/16 (935 mm)
  • Product Model: 880K-NL
  • Product Function: Knob, Night Latch
  • Door Hand Direction: Non-Handed
  • Product Projection: 2 3/4" (70 mm)
  • Product Category: Exit Devices and Trim
  • Department: Door Hardware

Professional Applications

  • Commercial Office Buildings
  • Educational Facilities
  • Healthcare Institutions
  • Retail Establishments
  • Industrial and Warehouse Facilities
  • Multi-Tenant Residential Properties
  • Government and Municipal Buildings

Why Choose Von Duprin Quality?

Von Duprin exit device trim products deliver professional-grade reliability through heavy 10 gauge (2.4 mm) brass, bronze, or stainless steel construction, meeting Grade 1 Heavy Duty standards for the most demanding commercial applications. The 880K-NL's non-handed design and flexible field sizing reduce installation complexity while ensuring consistent, dependable performance. Engineered for compatibility with the full range of 88 Series exit device configurations, Von Duprin trim is the trusted choice for commercial facilities where code compliance and long-term durability are essential.

Manufacturer Resources

Von Duprin 88 Series Catalog

Product Specs

Subcategory:
Exit Device Trim
Series:
88 Exit Trim
Grade:
Grade 1
Duty Level:
Heavy Duty
Compatibility:
88 Series Exit Devices
Product Group:
Exit Devices and Trim
Product Subgroup:
Exit Device Trim
Product Type:
Exit Device Trims
Commercial/Residential:
Commercial
Rim Center Line:
A 39 13/16 (1011 mm) B 36 13/16 (935 mm)
Product Model:
880K-NL
Product Function:
Knob, Night Latch
Door Hand Direction:
Non-Handed
Product Projection:
2 3/4" (70 mm)
Product Category:
Exit Devices and Trim
Department:
Door Hardware

Von Duprin 880K-NL-R US10B – Frequently Asked Questions

1) Will the Von Duprin 880K-NL trim work on any exit device, or only Von Duprin 88 Series?
The 880K-NL is built for Von Duprin 88 Series exit devices only. It won't mount to a 98/99, a 33A/35A, or another brand's device. The 88 Series is the wide-style crossbar family, sold in rim, surface vertical rod, concealed vertical rod and mortise configurations, and the 880 trim line is sized to all of them. If your device is not an 88, you need the trim made for that device family.
2) What does night latch function mean on exit device trim, and who should use it?
Night latch means the outside knob is always rigid and does not retract the latch. A key in the cylinder retracts the latch to let you in, and that is the only way through from outside. From the inside, pushing the crossbar always releases, so egress stays free. It's the standard choice for a locked exterior or tenant door where staff or a property manager keys in and the public exits only. If you want the outside knob to operate freely instead, that's a different function in the 880 line.
3) Do I need to order the 880K-NL trim handed for a left or right hand door?
No handing to specify. The 880K-NL is non-handed, so one part covers left hand, right hand, and reverse bevel openings. That's useful if you are stocking spares for a building with doors swinging both ways, since a single trim number fits them all.
4) What's a night latch alternative to the Von Duprin 880K-NL if I want a lever instead of a knob?
A few Grade 1 night latch lever trims sit in the same slot. The Sargent 704ET is a night latch lever trim with field reversible operation, and the 704-ETL in the PE Series is the night latch lever with key retract. The Sargent 744 is the 70 Series night latch trim for surface vertical rod and mortise 8700 and 8900 devices. The Corbin Russwin VT957ET is a nightlatch escutcheon trim in stamped or formed stainless for the ED5000 Series. All of them mount to their own brand's device, though, so a lever swap means changing the device family too, not just the trim.
5) Is the Accentra 121NL a direct replacement for the Von Duprin 880K-NL?
No. The Accentra 121NL is a nightlatch exit device trim, so it shares the function, but it is built to Accentra exit devices while the 880K-NL is made for Von Duprin 88 Series devices. Trim mounting and center line dimensions are device-specific - the 880K-NL uses rim center line dimensions of A 39 13/16 inch and B 36 13/16 inch. Treat the 121NL as a functional equivalent for an Accentra device, not a drop-in on an 88 Series crossbar.
6) What looks like a substitute for the 880K-NL but will not give me keyed entry?
Watch out for dummy, passage and blank escutcheon trims, which resemble a keyed trim but do not lock or key. The Detex 02BN is a dummy S-lever trim with blank escutcheon, the Arrow SRX01 is a passage function Sierra lever trim, the Corbin Russwin 3310AET is a passage function trim for ED300 Series devices, and the Falcon 212L is a blank escutcheon trim. None of these provide the key-retracts-latch entry the 880K-NL night latch function provides.
7) How far does the Von Duprin 880K-NL knob trim stick out from the door face?
Projection is 2 3/4 inches (70 mm) off the door. Worth checking against anything alongside the opening, a return wall, an adjacent leaf in a pair, or a card reader, so the knob has clear grip room and nothing fouls the swing.
8) What are the A and B rim center line dimensions for the 880 trim, and why do they matter?
Rim center line dimensions are A 39 13/16 inches (1011 mm) and B 36 13/16 inches (935 mm). Those are the layout points the trim has to align to on the door, so when you lay out a new prep or check an existing one, those centers tell you whether the knob and cylinder will land where the 88 Series device expects them.
9) Is the 880K-NL heavy enough for a high traffic school or hospital entrance?
It's a Grade 1 heavy duty trim, the top commercial classification, built from heavy 10 gauge (2.4 mm) brass, bronze, or stainless steel. That's the construction level specified for schools, healthcare, government buildings and other openings that see constant cycling. It is a commercial product, not a residential one.
10) What other 880 trim functions can I get if night latch isn't what I need?
The 880 line covers four functions plus a blank plate: 880DT dummy trim, 880K knob, 880NL night latch, and 880TP thumbpiece, with an optional 880EO exit only trim plate. If the door should be exit only with no outside operation, order it as 88EOx880EO with the device. The 880K-NL is the knob with night latch operation.
11) I want keypad or card access on my exit device instead of a keyed knob. What replaces night latch trim?
Electrified or pushbutton trim takes the place of a keyed night latch knob. The Dormakaba E-Plex 201U is an electronic pushbutton exit trim for wide stile doors, and the PowerPlex P201U works on rim, mortise and SVR devices. For access control tied to a reader, the Command Access ET15, ET25 and ET26 are electrified exit trims with 12V/24V operation and fail safe or fail secure options, the ET26 being Grade 1 and field reversible. Command Access also makes a 230L electrified trim for Von Duprin V96/36/23 Series devices.
12) Can I use the 880K-NL on a fire rated door opening?
The 88 Series devices it mounts to are made for both panic and fire rated applications, so the trim is used across both. The controlling detail is the device itself and how the opening is labeled: night latch trim never dogs open and the outside knob stays rigid, which is the behavior fire rated openings require. Confirm the specific 88 device model on your door carries the fire label you need.
13) What is the difference between the Von Duprin 880K-NL and a storeroom function exit trim?
With the 880K-NL night latch knob, the key retracts the latch to allow entry; the knob itself does not operate the latch. A storeroom trim such as the Design Hardware KIL Storeroom, the Pamex E9000 with L3 lever, or the Marks USA M195F lever/rose trim gives the outside lever that is always locked and turned only after the key is used. The Pamex E9000 is Grade 1 and fits doors 1-3/8 inch to 2 inch. Choose night latch when you want a knob that stays fixed and key-only entry, storeroom when the user expects to grip a lever after keying.
14) If the door does not need outside entry at all, what is a simpler alternative to the 880K-NL?
For an exit only opening, drop the keyed knob entirely. Von Duprin offers an 880EO exit only trim plate within the 880 Series, ordered with the device as 88EOx880EO. Among other brands, the BEST 1700 Series is a wide stile exit only pull trim for 2000 Series devices and the BEST 4900 Series is a wide stile exit only lever trim for the same devices. Since the 88 Series is a wide-style crossbar device, wide stile is the right family of trim to be looking at.
15) Which night latch exit trims are closest to the 880K-NL in grade and duty level?
The 880K-NL is Grade 1 heavy duty. The nearest peers on those two counts with the same night latch function are the Sargent 704ET, Grade 1 heavy duty night latch for 700 Series devices, the Sargent 704-ETL, Grade 1 heavy duty night latch with key retract in the PE Series, and the Sargent 744, a Grade 1 night latch trim where the key retracts the latch, built for 8700 and 8900 Series surface vertical rod and mortise devices. Each is matched to its own device series, so confirm the device before substituting.
16) I need a pull instead of a knob but still want night latch keyed entry - what are my options?
The 880K-NL uses a knob with a 2 3/4 inch projection. If a pull suits the opening better, the Design Hardware 2P-03NL is a Grade 1 pull trim with a cylinder hole in night latch form for 1000R and 2000R devices, the Dexter ED1500T-PULL-NC is a Grade 1 nightlatch pull plate trim with a raised lip, and the Tell EDPT is a pull trim with cylinder hole, less cylinder, for doors 1-3/8 inch to 1-3/4 inch. Each is tied to its own device series.
17) Is there a night latch escutcheon trim comparable to the 880K-NL for Corbin Russwin or Dorma devices?
Yes. The Corbin Russwin VT957ET is a nightlatch escutcheon trim in stamped or formed stainless steel for ED5000 Series devices, and the Dorma YR03R is a wide stile escutcheon lever trim in night latch function, supplied less cylinder. Both share the 880K-NL night latch function but are designed around their own manufacturers' exit devices, so they are alternatives at the opening level rather than parts swaps on an 88 Series device.
18) For a classroom door, should I use the 880K-NL or a classroom function trim?
The 880K-NL is night latch, which keys entry only and does not leave the outside trim unlocked. A classroom function is the usual choice where the room is unlocked for periods of the day: the Falcon 510L is a heavy duty classroom function trim with lever handle for 24/25 Series devices, the Falcon 179L is a medium duty classroom trim for 1790 Series devices, the Accentra 446F is a Grade 1 classroom function Augusta lever trim, and the Dexter ED1000T-CLRM-TP-NC is a Grade 1 classroom thumbpiece and pull plate trim supplied less cylinder.
19) What finishes does the Von Duprin 880K-NL night latch knob trim come in?
Eleven finishes, so you can match what's already on the building: 605 bright brass, 606 satin brass, 612 satin bronze, 613 oil rubbed bronze, 619 satin nickel, 622 matte black, 625 bright chrome, 626 satin chrome, 629/US32 bright stainless, 643E aged bronze, and 693/SPBLK black painted. 626 satin chrome is the usual institutional standard; 629 and 613 turn up most on storefront and hospitality work.
How fast can I get the Von Duprin 880K-NL-R US10B 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 Von Duprin 880K-NL-R US10B come with a warranty?
Absolutely. The Von Duprin 880K-NL-R US10B 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 880K-NL-R US10B?
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