Hinges
UL-Listed Butt Hinge — 4 Ball Bearing
BH-UL-4BB
Heavy-duty full mortise butt hinge with five knuckles and four ball bearings in 304 premium stainless steel. ANSI/BHMA Grade 1, UL-listed for 3-hour fire doors, with a non-removable pin for enhanced security.
Specifications
| Parameter | Value |
|---|---|
| Design | 5 knuckles · 4 ball bearings |
| Material | 304 Premium Stainless Steel |
| Type | Full mortise, square corners |
| Pin | Non-removable (enhanced security) |
| Max load | Up to 120 kg |
| Standards | UL 10C (fire rating 3 hours) · NFPA 80 (fire safety) · ANSI/BHMA A156.18 (finishes) · ANSI/BHMA A156.1 Grade 1 (performance) |
| Sizes (H × W × T) | 4.5" × 4.0" × 4.6 mm · 4.5" × 4.5" × 4.6 mm |
| Finishes | Matt Chrome |
Technical Documents
Datasheets, CAD files and finish samples are available on request.
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