Product Description
9975TP-F-US28-4 Von Duprin 9975 Series with 990TP-M Thumbpiece Fire Rated Mortise Lock Exit Device in Anodized Aluminum
The 9975TP-F-US28-4 is a Von Duprin 9975 Series Mortise Lock exit device in Aluminum (US28/628), sized for 4' doors. Thumbpiece Trim — thumbpiece-operated outside trim for keyed entry. Night latch function with thumbpiece activation. Ships less cylinder — order a mortise cylinder separately to match your existing keyway.
Fire Rated — UL listed for use on fire-rated openings. Mechanical dogging is deleted per UL code on fire-rated models. 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 | 9975TP-F-US28-4 |
| Brand | Von Duprin (Allegion) |
| Series | Von Duprin 9975 |
| Function | Thumbpiece |
| Grade | ANSI/BHMA A156.3 Grade 1 |
| Mount Type | Mortise Lock (mortise body recessed into door edge) |
| Finish | Aluminum (US28/628) |
| Door Size | 4 Foot |
| Cylinder | Ships less cylinder |
| Fire Rating | Fire Rated — UL Listed |
- Von Duprin 9975 Series touch bar mechanism — Grade 1 architectural-grade panic hardware
- Mortise Lock (mortise body recessed into door edge)
- Aluminum finish
- Fire rated — UL listed for fire-rated openings, no mechanical dogging
Image shown is representative of the product line. Actual finish, trim, and configuration may vary by SKU.
