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Hager BB1279 NRP 4-1/2" x 4-1/2" Full Mortise - Ball Bearing Hinge, Steel with Plated Finish
The Hager BB1279 NRP is a professional-grade Full Mortise Ball Bearing Hinge engineered for commercial and high-security residential applications. This 4.5" x 4.5" hinge features a specialized Non-Removable Pin (NRP), making it a critical safety component for outswinging exterior doors. Crafted from high-strength steel with a precision-plated finish, the Hager BB1279 NRP is designed to support 1-3/4" thick doors in medium-frequency environments, providing smooth operation and enhanced tamper resistance.
Advanced Security for Outswinging Doors
The Hager BB1279 NRP is specifically designed to address the vulnerabilities of exterior doors where hinge pins are accessible from the outside.
- Non-Removable Pin (NRP): Includes a hidden set screw within the hinge barrel that locks the pin in place. This set screw can only be accessed when the door is open, preventing intruders from removing the pin and the door leaf from the frame.
- Ball Bearing Performance: Equipped with two precision ball bearings, this hinge reduces friction and prevents the metal-on-metal grinding found in plain bearing hinges. This is essential for doors using automatic door closers to ensure a consistent, quiet close.
- Architectural Versatility: Available in a wide array of stock finishes including US26D (Satin Chrome), US10B (Oil Rubbed Bronze), and L1 (Black) to match any hardware aesthetic.
- Fire-Rated & Compliant: Certified to meet UL standards for a 3-hour fire rating and complies with NFPA80 requirements for fire-rated door assemblies.
Technical Specifications
| Feature | Details |
| Model | Hager BB1279 NRP |
| Hinge Type | Full Mortise / Ball Bearing |
| Dimensions | 4-1/2" x 4-1/2" (114 mm x 114 mm) |
| Metal Thickness | .134 Gauge (Standard Weight) |
| Material | Steel with Steel Pin |
| Security | NRP (Non-Removable Pin) with Set Screw |
| ANSI Standard | Meets ANSI A8112 |
| Fire Rating | UL Listed (3-Hour Fire Rated) |
| Door Thickness | Designed for 1-3/4" (44 mm) |
| Knuckles | 5-Knuckle Design |
Understanding the NRP Advantage
For facility managers and security-conscious homeowners, the NRP feature is a crucial upgrade. On an outswinging door, a standard hinge pin can be tapped out with a hammer and screwdriver in seconds. The Hager BB1279 NRP eliminates this risk by mechanically anchoring the pin into the barrel. This provides long-term durability and peace of mind without compromising the clean, architectural look of a standard 5-knuckle hinge.
Ideal Applications:
- Commercial Exterior Exits: Preventing unauthorized entry on outswinging back doors.
- Storage Rooms & IT Closets: Securing high-value areas against hinge tampering.
- Schools & Hospitals: Durable construction for medium-traffic hallway doors.
- Retail Storefronts: Ensuring smooth operation for doors with overhead closers.
| General - US Finishes | US26D - Satin Chrome or US26 - Polished Chrome or L1 - Black or US15 - Satin Nickel or US3 - Polished Brass or US4 - Satin Brass or US10 - Satin Bronze or US10A - Oil Rubbed Bronze or US10B - Oil Rubbed Bronze or USP - Prime Painted |
| Brand | Hager |
| Hinge Height | 4.5" Hi |
| Hinge Width | 4.5" 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 | Square |
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