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Hager BB1173 NRP 4-1/2" Ball Bearing Half Surface Hinge
The Hager BB1173 NRP is a high-performance half surface hinge designed for versatility and ease of installation. This specialized hinge is surface mounted on the face of the door and mortised into the frame, making it the perfect solution for retrofitting or repairing regular weight hollow metal or wood composite doors. Engineered for longevity, this 5-knuckle ball bearing hinge provides smooth operation for doors requiring low-frequency service.
Specialized Mounting and Versatility
The beveled surface leaf offers a clean, professional appearance when mounted to the door face. Because the BB1173 is reversible, it can be used for both left-hand and right-hand door swings, simplifying the ordering process for large projects. This hinge is specifically designed for 1-3/4" thick doors and includes thru-bolts and grommet nuts to ensure a secure, permanent attachment to wood composite door cores.
Enhanced Security with Non-Removable Pin (NRP)
For outward-swinging doors, security is a primary concern. The NRP (Non-Removable Pin) feature prevents unauthorized removal of the door by securing the pin with a hidden set screw in the barrel. Even if an intruder attempts to tap out the pin from the exterior, the Hager NRP remains locked in place. This innovation provides essential enhanced security for commercial entrances and exterior storage areas.
Technical Specifications
| Feature | Specification |
| Model Number | Hager BB1173 NRP |
| Size | 4-1/2" (114mm) |
| Hinge Type | Half Surface - 5 Knuckle - Ball Bearing |
| Mounting | Surface (Door Face) / Mortise (Jamb) |
| Material | Steel with Steel Pin |
| Gauge (Thickness) | 0.134" |
| Bearing Count | Two Ball Bearings |
| Security Feature | Non-Removable Pin (NRP) |
| Standards | ANSI A8412 Compliant |
| Handing | Reversible |
Installation Hardware
The Hager BB1173 comes furnished with a specific set of high-strength fasteners to accommodate both metal and wood door materials:
- Door Leaf: 2" x 1/4-20 OH Machine Screws & Grommet Nuts (thru-bolts)
- Jamb Leaf: 1/2" 12-24 FPHM (Machine Screws)
Finish and Custom Options
We stock this hinge in US26D (Satin Chrome) and USP (Prime for Paint). Additional options available by quote include:
- Premium Finishes: Satin Bronze (US10), Antique Bronze (US10A), and Oil Rubbed Bronze (US10B).
| General - US Finishes | US26D - Satin Chrome or USP - Prime Painted |
| Brand | Hager |
| Hinge Height | 4.5" Hi |
| Hinge Grade/Thickness | Standard Wt .119 to .146 |
| Hinge Type | Half Surface |
| Hinge Options | Ball Bearing, NRP (Non Removable Pin) |
| Base Material | Steel |
| Hinge Corners | Square |
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