McKinney SQ314 4-1/2 x 4 Standard Weight Square Barrel Stainless Steel Full Mortise Hinge

The McKinney SQ314 is a full mortise, standard weight butt hinge featuring a distinctive square knuckle barrel design that delivers a clean, squared architectural appearance. Manufactured in stainless steel, this 4-1/2 x 4 hinge is built for commercial and architectural door applications where a refined, geometric aesthetic is required alongside dependable, long-term performance. Also referenced as the McKinney SQ314 square barrel hinge, this full mortise hinge recesses flush into both the door edge and frame, producing a neat, professional installation.

Institutional Grade Features & Benefits

• Square Barrel Knuckle: The square knuckle barrel profile sets this hinge apart from round-barrel counterparts, providing a sharp, architectural look consistent with modern and contemporary door hardware specifications.
• Full Mortise Design: Mortises directly into the door edge and door frame for a flush, clean installation — the standard method on commercial hollow metal and wood doors.
• Stainless Steel Construction: Offers strong resistance to corrosion and surface wear, making the SQ314 well-suited for demanding environments where finish durability matters.
• Standard Weight Classification: Engineered for standard-weight door applications, providing the appropriate load capacity for typical commercial door assemblies without over-engineering.
• Precise Leaf Thickness: Steel leaf thickness of 0.134 in. per the McKinney full-line catalog, ensuring consistent performance and dimensional accuracy in mortise pocket installations.
• 4-1/2 x 4 Hinge Size: A widely specified commercial hinge size compatible with standard door thicknesses and common frame prep dimensions used across commercial construction projects.
• McKinney Brand Quality: McKinney is a recognized name in commercial door hardware, trusted by architects, specifiers, and contractors for consistent manufacturing tolerances and broad product availability.

Technical Details