Product Description
9957K-F-US28-4 Von Duprin 9957 Series with 996K Knob Trim Fire Rated Surface Three Point Latch Exit Device in Anodized Aluminum
The 9957K-F-US28-4 is a Von Duprin 9957 Series Surface Three Point Latch exit device in Aluminum (US28/628), sized for 4' doors. Knob Trim — outside knob for keyed entry. Night latch function. 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: 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 | 9957K-F-US28-4 |
| Brand | Von Duprin (Allegion) |
| Series | Von Duprin 9957 |
| Function | Knob Trim |
| 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 | Fire Rated — UL Listed |
- 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
- 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.
