McKinney TA3750 4-1/2 x 4-1/2 Two-Knuckle Heavy Weight Full Mortise Hinge
The McKinney TA3750 is a full mortise, two-knuckle heavy weight butt hinge measuring 4-1/2 inches by 4-1/2 inches. Engineered for demanding door applications, this hinge is Approved for NFPA 80 fire-rated openings and carries the trusted McKinney name -- a benchmark in commercial and architectural door hardware. The TA3750 is designed to be fully mortised into both the door edge and the door frame, providing a flush, clean installation profile suited to high-traffic and heavy-duty environments. The two-knuckle design is characteristic of heavy weight hinge construction, delivering robust pivot support for substantial door assemblies.
Institutional Grade Features & Benefits
- Full Mortise Installation: Mortises into the door edge and frame for a clean, recessed fit that maintains door and frame integrity across repeated cycles.
- Two-Knuckle Heavy Weight Construction: The two-knuckle configuration is the hallmark of heavy weight butt hinges, providing concentrated, durable pivot support engineered for demanding duty cycles.
- Fire Rating: Approved for NFPA 80 fire-rated openings.
- 4-1/2 x 4-1/2 Inch Leaf Size: A standard commercial heavy-weight hinge size, compatible with a wide range of door thicknesses and widths commonly specified in commercial and institutional construction.
- McKinney Quality: McKinney has been a trusted manufacturer of architectural hinges for generations, with products widely specified in commercial, institutional, and governmental projects across North America.
Technical Details
| Feature | Details |
|---|---|
| Brand | McKinney |
| Part Number | TA3750 |
| Part Type | Hinge -- Full Mortise Butt Hinge |
| Hinge Size | 4-1/2 in. x 4-1/2 in. |
| Knuckle Configuration | Two-Knuckle |
| Weight Class | Heavy Weight |
| Mounting Style | Full Mortise |
| Fire Rating | Approved for NFPA 80 fire-rated openings |
| Gauge (Thickness) | 0.180 in. |
Gauge (thickness): 0.180 in. -- the exact steel leaf thickness for this weight class and leaf height, per the McKinney Full-Line Catalog (AADSS1010289).
Documentation
McKinney does not publish a per-model cut sheet for the TA3750; the drilling template above is the manufacturer documentation available for this hinge.
| General - US Finishes | US26D - Satin Chrome or BSP - Black Suede Power Coat or US3 - Polished Brass or US4 - Satin Brass or US10 - Satin Bronze or US10B - Oil Rubbed Bronze |
| Door Handing | LH or RH |
| Brand | McKinney |
| Hinge Type | Full Mortise |
| Hinge Mounting | Full Mortise |
| Hinge Height | 4.5" Hi |
| Hinge Width | 4.5" Wi |
| Hinge Grade/Thickness | Heavy Wt .180 to .190 |
| Hinge Corners | Square |
| Hinge Knuckle | 2 Knuckles |
| Base Material | Steel |
| Part Type | Hinge |
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