McKinney TCA3386 4-1/2x4-1/2 Five-Knuckle Heavy Weight Stainless Steel Concealed Bearing Hinge | Full Mortise
McKinney TCA3386 4-1/2 x 4-1/2 five-knuckle heavy weight stainless steel concealed bearing 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 TCA3386 4-1/2 x 4-1/2 Five-Knuckle Heavy Weight Stainless Steel Concealed Bearing Full Mortise Hinge
The McKinney TCA3386 is a full mortise, five-knuckle heavy weight butt hinge engineered for high-frequency door openings that demand long-term performance and a refined appearance. Constructed from stainless steel at a robust 0.180 in. leaf thickness, this hinge delivers the structural integrity expected in demanding commercial and institutional door hardware applications. The concealed antifriction bearings are hidden entirely within the knuckle barrel, preserving a clean, traditional five-knuckle profile while providing the smooth, low-friction operation characteristic of a bearing-grade hinge. The TCA3386 is also commonly referenced as a concealed bearing stainless steel full mortise hinge and fits within McKinney's heavy weight hinge offering for high-cycle openings.
Institutional Grade Features & Benefits
- Five-Knuckle Heavy Weight Construction: The five-knuckle barrel profile and heavy weight stainless steel material combine to support doors subject to continuous, high-frequency use without compromising structural integrity over time.
- Concealed (Antifriction) Bearings: Bearings are recessed entirely inside the knuckle, eliminating the exposed bearing race visible on standard ball-bearing hinges. The result is a smooth swinging action and a clean barrel silhouette prized in upscale architectural and institutional settings.
- Stainless Steel Material: Stainless steel construction offers inherent corrosion resistance, making the TCA3386 well suited for environments where moisture, humidity, or hygiene requirements are a consideration.
- 0.180 In. Leaf Thickness: The precise 0.180 in. gauge — confirmed in the McKinney full-line catalog — provides the material strength required for heavy weight hinge classification, supporting heavier door slabs and higher cycle counts.
- Full Mortise Installation: Designed for full mortise application, both leaves set flush into routed pockets in the door edge and frame, producing a clean, professional installation standard for commercial door openings.
- 4-1/2 x 4-1/2 In. Size: The 4-1/2 x 4-1/2 inch leaf dimension is one of the most widely specified sizes in commercial door hardware, accommodating a broad range of standard door widths and weights.
Technical Details
| Feature | Details |
|---|---|
| Brand | McKinney |
| Model / Part Number | TCA3386 |
| Part Type | Full Mortise Butt Hinge |
| Hinge Size | 4-1/2 in. x 4-1/2 in. |
| Knuckle Count | Five-Knuckle |
| Weight Class | Heavy Weight |
| Bearing Type | Concealed Antifriction Bearings (hidden within the knuckle) |
| Material | Stainless Steel |
| Gauge / Leaf Thickness | 0.180 in. |
| Installation Type | Full Mortise |
Documentation
- McKinney Catalog / Product Page - TCA3386
- 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 | US32D - Satin Stainless Steel/ 630 |
| 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 | Stainless Steel |
| Hinge Options | Concealed Bearing |
| Part Type | Hinge, Hinge |
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