Ives 3CB1HW 4.5X4.5 630 NRP 3-Knuckle Concealed Bearing Hinge, Heavy Weight, 4-1/2" x 4-1/2", Non-Removeable Pin, Satin Stainless Steel

3CB1HW 3 Knuckle, concealed bearing, heavyweight full mortise hinge

Recommended for heavier weight doors (>150 lbs)                          Recommended for high-frequency usage (400 cycles per day)                Made with two heavy-duty concealed nylon bearings                      Recommended for use with a door closer                                                Packed with fasteners for hollow metal and wood doors

Certifications                                                                                          Certified to ANSI/BHMA A156.1 for performance standards                  Meets ANSI/BHMA 156.7 for template hinge dimensions                              UL Classified for windstorm rated assemblies - R37965                                UL Listed, 3-hour fire doors Material substrate                                          Made from brass, 1040 steel, or 304 series stainless steel