Product Description
9975NL-US3-4 Von Duprin 9975 Series with 990NL Night Latch Trim Mortise Lock Exit Device in Bright Brass
The 9975NL-US3-4 is a Von Duprin 9975 Series Mortise Lock exit device in Bright Brass (US3/605), sized for 4' doors. Night Latch — outside lever locks and unlocks by key, inside always free for egress. Ships less cylinder — order a mortise cylinder separately to match your existing keyway.
ANSI/BHMA A156.3 Grade 1 certified. Hex key dogging standard. Field reversible handing.
Pro-Tip from Our Locksmiths: The 9975 is the most complex exit device in the Von Duprin lineup. It has the most moving parts and requires the most precise door prep. When quoting 9975 jobs, add time for mortise pocket verification and potential adjustment. Get it right and it's bulletproof — rush it and you'll be back.
| Specifications | |
|---|---|
| Part Number | 9975NL-US3-4 |
| Brand | Von Duprin (Allegion) |
| Series | Von Duprin 9975 |
| Function | Night Latch |
| Grade | ANSI/BHMA A156.3 Grade 1 |
| Mount Type | Mortise Lock (mortise body recessed into door edge) |
| Finish | Bright Brass (US3/605) |
| Door Size | 4 Foot |
| Cylinder | Ships less cylinder |
| Fire Rating | Non Fire Rated |
- Von Duprin 9975 Series touch bar mechanism — Grade 1 architectural-grade panic hardware
- Mortise Lock (mortise body recessed into door edge)
- Bright Brass finish
- Hex key dogging standard — hold latch retracted during business hours
Free Expert Support — As an authorized Von Duprin distributor, Lock Depot provides full manufacturer warranty coverage and same day shipping on most orders. Call (877) 365-5625 for personalized help.
Image shown is representative of the product line. Actual finish, trim, and configuration may vary by SKU.
