Hager BB1279 4.0" x 4.0" NRP Ball Bearing Hinge – Full Mortise
The Hager BB1279 4.0" x 4.0" NRP is a high-performance, full-mortise hinge designed for durability and enhanced perimeter security. Engineered for medium-weight doors receiving low-frequency service, this hinge is the industry standard for reliable operation in both commercial and high-end residential applications.
Constructed from high-quality steel with a plated finish, the BB1279 features two ball bearings to ensure smooth, quiet door swing while reducing friction and wear over time.
Integrated NRP Security Feature
This model comes standard with a Non-Removable Pin (NRP), a critical security upgrade for exterior or outward-swinging doors.
- Tamper Resistance: The NRP prevents unauthorized removal of the hinge pin from the outside, ensuring the door cannot be lifted out of the frame even if the knuckles are exposed.
- Outward Swing Protection: Ideal for commercial storefronts or secure storage areas where hinges are located on the "attack side" of the door.
- Peace of Mind: Provides a robust layer of defense against forced entry through hinge manipulation without sacrificing the clean aesthetic of the button tip and plug design.
Technical Specifications
| Feature | Specification |
| Model | Hager BB1279 |
| Dimensions | 4.0" x 4.0" (102mm x 102mm) |
| Hinge Type | Full Mortise - Ball Bearing (2 Bearings) |
| Security | Non-Removable Pin (NRP) |
| Material | Steel with Steel Pin |
| Metal Thickness | 0.129" |
| Door Thickness | Standard 1 3/4" Doors |
| ANSI Grade | Complies with ANSI A8112 |
| Base Metal | Steel with Plated Finish |
| Pin Style | Non-rising removable pin with button tip and plug |
Hardware Included
Each hinge is furnished with a complete screw pack to accommodate various mounting surfaces:
- All Wood Screws: (4 ea)1-1/4" x 12 FPHW
- All Machine Screws: (8 ea) 1/2" 12-24 FPHM
Applications and Use Cases
The Hager BB1279 is best suited for doors where frequency of use is low to medium but security is non-negotiable. It is a preferred choice for:
- Commercial Office Entries
- Exterior Utility Rooms
- Residential Rear Exit Doors
- Apartment Unit Entry Doors
| General - US Finishes | US26D - Satin Chrome |
| Brand | Hager |
| Hinge Height | 4.0" Hi |
| Hinge Width | 4.0" Wi |
| Hinge Grade/Thickness | Standard Wt .119 to .146 |
| Hinge Type | Full Mortise |
| Hinge Options | Ball Bearing |
| Base Material | Steel |
| Hinge Corners | Square |
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