Product Description
LD9957TP-US28-4 Von Duprin 9957 Series with 990TP Thumbpiece Surface Three Point Latch Device with Less Dogging in Anodized Aluminum
The LD9957TP-US28-4 is a Von Duprin 9957 Series Surface Three Point Latch 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.
Latch Detector — Latch Detector monitors door position — reports latch bolt status to the access control panel. 24VDC.
ANSI/BHMA A156.3 Grade 1 certified. Hex key dogging standard. Field reversible handing.
Pro-Tip from Our Locksmiths: When servicing a 9957 three-point latch, check all three latch points independently. A misaligned top or bottom bolt can cause the whole device to bind. Adjust strikes one at a time, starting with the rim latch, then top, then bottom.
| Specifications | |
|---|---|
| Part Number | LD9957TP-US28-4 |
| Brand | Von Duprin (Allegion) |
| Series | Von Duprin 9957 |
| Function | Thumbpiece |
| Grade | ANSI/BHMA A156.3 Grade 1 |
| Mount Type | Surface Three Point Latch (three latch points for enhanced security) |
| Finish | Aluminum (US28/628) |
| Door Size | 4 Foot |
| Cylinder | Ships less cylinder |
| Fire Rating | Non Fire Rated |
| Electronics | Latch Detector |
- Von Duprin 9957 Series touch bar mechanism — Grade 1 architectural-grade panic hardware
- Surface Three Point Latch (three latch points for enhanced security)
- Aluminum finish
- Latch Detector — Latch Detector monitors door position — reports latch bolt status to the access control panel
- Hex key dogging standard — hold latch retracted during business hours
Authorized Von Duprin Distributor — Lock Depot is an authorized Von Duprin dealer. Every product ships brand new in original manufacturer packaging with full factory warranty. Contact us or call (877) 365-5625 for expert assistance.
Image shown is representative of the product line. Actual finish, trim, and configuration may vary by SKU.
