McKinney RBT4A3786 4-1/2x4-1/2 Five-Knuckle Heavy Weight Raised Barrel Hinge | Full Mortise
McKinney RBT4A3786 4-1/2 x 4-1/2 five-knuckle heavy weight raised barrel hinge.
Lead time: Normally ships in 2-3 business days via McKinney QuickShip; current lead time confirmed at order acknowledgment.
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McKinney RBT4A3786 4-1/2 x 4-1/2 Five-Knuckle Heavy Weight Raised Barrel Butt Hinge — Full Mortise
The McKinney RBT4A3786 is a full mortise, five-knuckle heavy weight steel butt hinge measuring 4-1/2 in. x 4-1/2 in. Its defining feature is a raised barrel — the barrel sits higher than a standard butt hinge barrel, allowing a high-frequency door to clear projecting casing trim or a deep frame return without binding. Fabricated from heavy-gauge steel at 0.180 in. leaf thickness, this hinge is engineered for demanding, high-cycle commercial and institutional door applications where a standard-weight hinge would be inadequate. Also referred to as a raised barrel butt hinge or elevated barrel hinge, the RBT4A3786 installs flush into mortised cutouts on both the door edge and frame in the conventional full-mortise configuration — the most common and structurally preferred method for commercial door hardware.
Institutional-Grade Features & Benefits
- Raised Barrel Clearance: The elevated barrel profile allows the door face to clear projecting door casing, thick applied trim, or deep frame returns that would otherwise interfere with door swing — a common requirement in renovation and historic retrofits as well as new construction with pronounced molding profiles.
- Heavy Weight Steel Construction: At 0.180 in. leaf thickness, this hinge exceeds standard-weight specifications, delivering the structural rigidity and long-term cycle life demanded by high-traffic commercial openings.
- Five-Knuckle Design: The five-knuckle barrel distributes load more evenly across the hinge pin than three-knuckle designs, reducing wear, minimizing play, and extending service life on doors that see frequent use.
- Full Mortise Installation: Both leaves recess fully into the door edge and frame, producing a flush, clean appearance and maximizing the bearing surface between the hinge and the door/frame substrate — the preferred configuration for commercial and institutional openings.
- McKinney Genuine OEM Quality: Manufactured by McKinney, a long-established commercial hinge brand, the RBT4A3786 is a direct, authentic replacement or new-installation hinge consistent with McKinney full-line catalog specifications.
Technical Details
| Feature | Details |
|---|---|
| Brand | McKinney |
| Part Number | RBT4A3786 |
| Part Type | Full Mortise Butt Hinge (Raised Barrel) |
| Hinge Size | 4-1/2 in. x 4-1/2 in. |
| Knuckle Count | Five-Knuckle |
| Weight Class | Heavy Weight |
| Gauge / Leaf Thickness | 0.180 in. |
| Material | Steel |
| Mounting Type | Full Mortise |
| Barrel Type | Raised Barrel |
Documentation
- McKinney Catalog / Product Page - RBT4A3786
- This model is a factory option (modified barrel/tip) of the base hinge; the McKinney document library publishes the cut sheet under the base model. The catalog page above carries the option's specification.
| Brand | McKinney |
| General - US Finishes | US26D - Satin Chrome |
| Hinge Type | Full Mortise |
| Hinge Mounting | Full Mortise |
| Door Handing | Field Reversible, Field Reversible |
| Hinge Height | 4.5" Hi |
| Hinge Width | 4.5" Wi |
| Hinge Grade/Thickness | Heavy Wt .180 to .190 |
| Hinge Corners | Square |
| Hinge Knuckle | 5 Knuckles |
| Base Material | Steel |
| Part Type | Hinge, Hinge |
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