Hager RCBB1279 4.5" x 4" US26D NRP Radius Corner Ball Bearing Hinge
The Hager RCBB1279 4.5" x 4" is a professional-grade, full mortise hinge designed for medium-weight doors in commercial or residential settings. Featuring a 1/4" radius corner, this hinge is specifically engineered for doors prepared with rounded mortise pockets.
Finished in US26D Satin Chrome, the RCBB1279 combines a sleek, modern aesthetic with the heavy-duty performance of two integrated ball bearings. These bearings ensure a smooth, silent swing and extend the life of the hinge by reducing vertical and lateral wear on the knuckles.
Enhanced Perimeter Security with NRP
This model is equipped with a Non-Removable Pin (NRP), making it an essential hardware choice for high-security areas:
- Tamper-Proof Design: The NRP feature utilizes a set screw in the barrel that is only accessible when the door is open. This prevents intruders from tapping out the hinge pin from the outside.
- Perfect for Outswing Doors: On outward-swinging doors where the hinge barrel is exposed to the exterior, the NRP provides critical protection against forced entry.
- Non-Rising Pin: Designed with a button tip and plug to ensure the pin stays seated firmly during frequent operation.
Technical Specifications
| Feature | Specification |
| Model | Hager RCBB1279 |
| Dimensions | 4 1/2" Height x 4" Width |
| Corner Type | 1/4" Radius Corner |
| Bearing Type | 2 Ball Bearings |
| Security Feature | Non-Removable Pin (NRP) |
| Material | Steel with Steel Pin |
| Gauge (Thickness) | 0.134" |
| Standard Finish | US26D (Satin Chrome) |
| Door Thickness | Designed for 1 3/4" Doors |
| ANSI Standard | Complies with ANSI A8112 |
Included Hardware & Fasteners
The Hager RCBB1279 is shipped with a complete fastener set for versatile installation:
- All Wood Screws: 1 1/4" x 12 FPHW (Flat Head Wood)
- All Machine Screws: 1/2" 12-24 FPHM (Flat Head Machine)
Customization & Special Orders
While US26D Satin Chrome is the standard stock finish, DoorwaysPlus.com can provide quotes for specialized project requirements:
- Alternative Finishes: US3 (Bright Brass), US4 (Satin Brass), US10 (Satin Bronze), US10B (Oil Rubbed Bronze), US15 (Satin Nickel), and US26 (Bright Chrome).
- Specialty Tips: Options include Hospital Tips, Ball Tips, Steeple Tips, and Urn Tips.
- Modifications: 5/8" radius corners, Wide Throw configurations, and Electric Modifications for access control systems are available by request.
| General - US Finishes | US26D - Satin Chrome |
| Brand | Hager |
| Hinge Height | 4.5" Hi |
| Hinge Width | 4.0" Wi |
| Hinge Grade/Thickness | Standard Wt .119 to .146 |
| Hinge Type | Full Mortise |
| Hinge Options | Ball Bearing, NRP (Non Removable Pin) |
| Base Material | Steel |
| Hinge Corners | 1/4" Radius |
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