Hager BB1129 NRP 4 1/2 Ball Bearing Half Mortise Hinge, 5 Knuckle, Steel - USP Prime Painted
The Hager BB1129 NRP is a heavy-duty Half Mortise Ball Bearing Hinge engineered for medium-frequency service on hollow metal doors. This specialized hinge is the professional choice for installations involving channel iron frames, where a standard full mortise hinge is not applicable. By combining a mortised door leaf with a surface-mounted jamb leaf, the BB1129 provides a rugged, stable pivot point for 1-3/4" thick doors. Finished in USP Prime Paint, this hinge is ready for a custom topcoat to match your facility's specific architectural requirements.
Technical Note: Half Mortise Hinges are designed to be mortised into the edge of the door and surface mounted on the face of the frame.
Enhanced Security with NRP Technology
The NRP (Non-Removable Pin) feature is an essential security requirement for any door that swings outward. It utilizes a set screw within the barrel that is only accessible when the door is open, preventing the pin from being tapped out from the exterior.
- Enhanced Security: Prevents unauthorized removal of the door by securing the hinge pins against tampering.
- Optimal for Outward Swinging Doors: Safeguards the exposed hinge barrels on exterior exits or corridor doors.
- Peace of Mind: Provides a durable, tamper-resistant solution without compromising the smooth mechanical action of the door.
Heavy-Duty Institutional Engineering
The Hager BB1129 is built to the rigorous ANSI A8212 standard, ensuring it can withstand the physical demands of high-traffic commercial and industrial environments.
- Two Ball Bearings: Equipped with high-quality bearings to minimize friction, resulting in a smooth swing and significantly extended hardware life.
- 5-Knuckle Design: The classic 5-knuckle configuration provides superior strength and weight distribution for medium-weight hollow metal doors.
- Beveled Surface Leaf: The frame-side leaf features a beveled edge, providing a clean, low-profile appearance on the face of the channel iron frame.
- Thru-Bolt Ready: Designed for a secure, permanent fit on industrial frames and doors.
Technical Specifications
| Feature | Details |
| Model | Hager BB1129 |
| Security Feature | NRP (Non-Removable Pin) |
| Hinge Type | Half Mortise / Ball Bearing |
| Knuckle Count | 5 Knuckle |
| Dimensions | 4-1/2" Height |
| Material | Steel with Steel Pin |
| Thickness | .134 Gauge |
| Finish | USP (Prime for Paint) |
| Door Thickness | Standard 1-3/4" (44mm) |
| ANSI Standard | A8212 |
| Handing | Reversible (Non-Handed) |
Hardware & Mounting Details
| Component | Fastener Type |
| Standard Screws | 1/2" 12-24 FPHM (Flat Phillips Head Machine) |
| Pin Style | Non-rising removable pin with button tip and plug |
| Frame Application | Channel Iron Frames |
| Door Application | Medium Weight Hollow Metal |
Why Choose the Hager BB1129 NRP?
For contractors and facility managers, the Hager BB1129 NRP is the definitive solution for industrial retrofits and new construction involving structural steel frames. The half-mortise configuration allows for a secure surface attachment to the frame while maintaining the clean look of a mortised door edge. With the added NRP security, this hinge is ideal for perimeter security doors, warehouse exits, and mechanical room openings.
Ideal Applications:
- Channel Iron Frames: The industry standard for mounting to structural steel.
- Industrial Warehouses: Durable enough for medium-frequency commercial use.
- Exterior Outswing Doors: Maximizing security with the Non-Removable Pin.
- Retrofit Projects: Perfect for replacing or upgrading hinges on non-standard frames.
| General - US Finishes | USP - Prime Painted |
| Brand | Hager |
| Hinge Height | 4.5" Hi |
| Hinge Grade/Thickness | Standard Wt .119 to .146 |
| Hinge Type | Half Mortise |
| Hinge Options | Ball Bearing, NRP (Non Removable Pin) |
| Base Material | Steel |
| Hinge Corners | Square |
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