McKinney T4B3386 4-1/2x4-1/2 Five-Knuckle Heavy Weight Stainless Steel Concealed Ball Bearing Hinge | Full Mortise
McKinney T4B3386 4-1/2 x 4-1/2 five-knuckle heavy weight stainless steel 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 T4B3386 4-1/2 x 4-1/2 Five-Knuckle Heavy Weight Stainless Steel Full Mortise Butt Hinge with Concealed Ball Bearings
The McKinney T4B3386 is a full mortise, five-knuckle heavy weight butt hinge engineered for high-frequency, high-load door openings. Constructed from stainless steel with a leaf thickness of 0.180 in., this hinge delivers the durability and smooth operation demanded by commercial and institutional door assemblies. The T4B heavy ball-bearing option incorporates concealed ball bearings, reducing friction and wear over the life of the opening — making it a preferred choice wherever continuous, reliable door swing performance is required. At 4-1/2 x 4-1/2 inches, the T4B3386 is sized appropriately for heavier door leaves and frames that call for a full mortise hinge installation.
Institutional Grade Features & Benefits
- Five-Knuckle Heavy Weight Design: The five-knuckle configuration provides increased knuckle contact area compared to standard-weight hinges, distributing load more evenly and adding structural integrity across the full range of door swing.
- Concealed Ball Bearings (T4B Option): Ball bearings are fully concealed within the barrel, delivering quiet, friction-free operation that extends hinge service life even under high-cycle, heavy-load conditions.
- Heavy Weight Gauge — 0.180 in. Leaf Thickness: The 0.180 in. steel leaf thickness (per the McKinney full-line catalog) exceeds standard-weight hinge stock, providing greater resistance to deflection and door sag over time.
- Stainless Steel Construction: Stainless steel offers excellent corrosion resistance, making the T4B3386 well-suited for environments where moisture, humidity, or corrosive conditions may be a concern.
- Full Mortise Installation: Designed for full mortise application — both leaves are mortised into the door edge and frame, producing a clean, flush appearance and a mechanically sound connection.
- High-Frequency, High-Load Performance: The combination of heavy weight gauge, five-knuckle geometry, and ball-bearing action positions the T4B3386 for openings that see demanding, repetitive use.
Technical Details
| Feature | Details |
|---|---|
| Brand | McKinney |
| Part Number | T4B3386 |
| 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 Ball Bearing (T4B Option) |
| Material | Stainless Steel |
| Leaf Thickness (Gauge) | 0.180 in. |
| Installation Type | Full Mortise |
Documentation
- McKinney Catalog / Product Page - T4B3386
- 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 |
| Part Type | Hinge, Hinge |
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