Hager BB1191 SH NRP 4-1/2" x 4-1/2" Full Mortise - Reverse Safety Stud & Non-Removable Pin
The Hager BB1191 4.5" x 4.5" SH NRP is a premium, high-security door hinge engineered for maximum durability in demanding environments. Constructed from Non-Ferrous Stainless Steel (Type 304L), this hinge is the ultimate solution for exterior openings, coastal regions, or any application where corrosion resistance and physical security are paramount.
Designed for 1 3/4" thick medium-weight doors, the BB1191 features two integrated ball bearings that provide a smooth, consistent swing while reducing friction and maintenance requirements over the life of the door.
Dual-Layer Security: Reverse Safety Stud & Non-Removable Pin
This specific model features a unique combination of two high-security innovations:
- Reverse Safety Stud (SH): The Safety Stud is a projecting pin on one leaf that fits into a hole in the opposite leaf when the door is closed. Even if the hinge knuckles are completely cut or ground off, the Safety Stud locks the door leaves together, preventing the door from being removed from the frame.
- Non-Removable Pin (NRP): The NRP feature includes a hidden set screw within the hinge barrel. This set screw is only accessible when the door is open, making it impossible for intruders to tap out the hinge pin from the outside on out-swinging doors.
Technical Specifications
| Feature | Specification |
| Model | Hager BB1191 SH NRP |
| Dimensions | 4 1/2" x 4 1/2" (114mm x 114mm) |
| Hinge Type | Full Mortise - Ball Bearing (2 Bearings) |
| Material | Stainless Steel (Type 304L) |
| Security Features | Reverse Safety Stud & Non-Removable Pin (NRP) |
| Metal Thickness | 0.134" Gauge |
| Door Thickness | Standard 1 3/4" Doors |
| ANSI Standard | Complies with ANSI A5112 (Stainless Steel) |
| Pin Style | Non-rising removable pin with button tip and plug |
| Base Material | Non-Ferrous (Corrosion Resistant) |
Hardware & Installation
Each Hager BB1191 hinge is furnished with a complete set of stainless steel fasteners to ensure a matching finish and long-lasting hold:
- All Wood Screws: (4 ea) 1-1/4" x 12 FPHW (Flat Head Wood)
- All Machine Screws: (8 ea) 1/2" 12-24 FPHM (Flat Head Machine)
Critical Application Notes
- Fire Rating Note: Please note that while Stainless Steel (ANSI A5112) is highly durable, hinges with a Brass base material (ANSI A2112) are not permitted for use on UL Fire Rated Door Openings.
- Ideal Use Cases: This hinge is the top choice for Outward Swinging Exterior Doors, Coastal Commercial Properties, and High-Security Entrances where preventing forced entry through hinge manipulation is a priority.
| General - US Finishes | US32D - Satin Stainless Steel/ 630 |
| 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), SH or SSF (Security Stud) |
| Base Material | Stainless Steel |
| Hinge Corners | Square |
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