Hager BB2171 NRP USP 4 1/2" Ball Bearing Full Surface Hinge - Prime Paint Finish
The Hager BB2171 NRP is a heavy-duty 4-1/2" Full Surface Ball Bearing Hinge engineered for medium-frequency service on hollow metal or wood composite doors. Designed specifically for use with channel iron frames, this hinge is the industry standard for industrial and commercial retrofits where a traditional mortise hinge cannot be used. Featuring a USP Prime Paint finish, the BB2171 is ready for a custom topcoat to match any facility's color scheme while providing the structural integrity required for 1-3/4" thick doors.
Enhanced Security with NRP Technology
The NRP (Non-Removable Pin) feature is a critical security upgrade for any door swinging outward. By utilizing a set screw in the barrel that is only accessible when the door is open, the NRP prevents intruders from tapping out the hinge pins to remove the door leaf from the frame.
- Optimal for Outward Swinging Doors: Perfect for exterior exits where hinge barrels are exposed to the public.
- Tamper-Resistant Design: Provides peace of mind by safeguarding against forced entry via hinge manipulation.
- Removable for Maintenance: While secure against unauthorized removal, the pin can still be removed by authorized personnel once the door is opened.
Heavy-Duty Engineering & Versatility
The Hager BB2171 is built to handle the physical demands of commercial traffic. With a .134 gauge thickness, it provides a rigid, stable pivot point for medium-weight doors.
- Two Ball Bearings: Equipped with high-quality ball bearings to reduce friction, ensuring a smooth, quiet swing and extending the life of the hinge under constant use.
- Full Surface Mounting: Ideal for applications where the door or frame is not prepared for mortise hinges, or when reinforcing a damaged opening.
- Thru-Bolt Installation: Supplied with thru bolts and grommets, providing a secure "sandwich" grip on the door leaf that prevents the hardware from pulling through the door material.
- Beveled Surface Leaves: The leaves feature beveled edges for a clean, professional aesthetic once installed.
Technical Specifications
| Feature | Details |
| Model | Hager BB2171 |
| Security Feature | NRP (Non-Removable Pin) |
| Hinge Type | Full Surface / Ball Bearing |
| Dimensions | 4-1/2" (114mm) Height |
| Material | Steel with Steel Pin |
| Thickness | .134 Gauge |
| Finish | USP (Prime for Paint) |
| Door Thickness | Standard 1-3/4" (44mm) |
| ANSI Standard | A8312 (Cylindrical Full Surface) |
| Handing | Reversible (Non-Handed) |
Hardware & Mounting Details
| Component | Fastener Type |
| Door Leaf | 2" x 1/4-20 OH Machine Screw with Grommet Nut |
| Jamb Leaf | 1/2" 12-24 OH Machine Screw |
| Pin Style | Non-rising removable pin with button tip and plug |
Why Choose the Hager BB2171 NRP?
For facility managers and commercial contractors, the Hager BB2171 NRP is the go-to problem solver for industrial openings. Whether you are dealing with a heavy-duty channel iron frame or need to reinforce a wood composite door, this hinge offers a secure, fire-rated pivot point. The thru bolt design ensures that the hardware stays put even in high-use environments like schools, warehouses, and municipal buildings.
Ideal Applications:
- Industrial Warehouses: Perfect for doors mounted to steel channel iron frames.
- Exterior Security Doors: Utilizing the NRP feature to prevent unauthorized entry.
- Retrofit Projects: An excellent solution for repairing openings where mortise pockets are failed.
- Medium Frequency Openings: Suitable for office suites, utility rooms, and stairwell doors.
| General - US Finishes | USP - Prime Painted |
| Brand | Hager |
| Hinge Height | 4.5" Hi |
| Hinge Grade/Thickness | Standard Wt .119 to .146 |
| Hinge Type | Full Surface |
| Hinge Options | Ball Bearing, NRP (Non Removable Pin) |
| Base Material | Steel |
| Hinge Corners | Square |
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