hinge black overlay describes this Rockford Process Control, Inc. free swinging overlay five knuckle hinge in gloss black, so installers get a defined look and motion for institutional and cabinet doors that call for an overlay, semi-concealed design. The hinge is designed for the 32 mm hole system, which lets you line it up with standard system boring for repeatable frame mounting in shop or on-site work. Its five knuckle layout creates a smooth pivot point that supports consistent free swinging action over time on overlay door applications. As a semi-concealed hinge in the institutional hinge class, it leaves the knuckle and tips visible while tucking other structure back, which suits projects that balance appearance with practical access to the barrel. The gloss black finish defines the visual edge at the frame, helping match other black institutional hardware in the same opening.
This Rockford Process Control, Inc. semi-concealed overlay hinge is designed for the 32 mm hole system, so the mounting pattern aligns with standard system boring for casework and institutional cabinetry. The 1-3/4 inch frame leaf length sets a known footprint on the frame side, helping you plan screw placement in relation to face frame or stile edges. Elongated holes formed into both leaves allow you to shift the hinge slightly during installation, which lets you refine the overlay and gap line after the initial screw bites. The tight screw pin inside the five knuckle barrel keeps the pivot solid, giving you a defined swing path with the 2-3/4 inch barrel height acting as a stable vertical reference along the door edge.
This hinge sits in the institutional hinge category as a semi-concealed overlay pattern, which positions it for facilities, medical, or cabinet applications that use robust visible barrels and overlay doors. The free swinging function means the door moves without built-in closing force, letting other hardware handle closing where required. Hospital grade tips on the barrel give each end a shaped termination, matching institutional expectations for smooth, finished hinge ends at the door edge. The gloss black finish ties the hinge into projects that specify black hardware, so frame and door lines can visually coordinate with pulls, catches, or other black-finished components. With a barrel height of 2-3/4 inches, the hinge presents a substantial vertical profile at the opening, which matches doors that visually benefit from a taller hinge barrel.
The hinge is designed for the 32 mm hole system, so once casework or frames are bored on that pattern, this hinge can be positioned using those standard references for consistent placement across multiple doors. A material thickness of 0.095 inches, or 2.4 mm, helps each leaf resist twisting, so once you set the door to the preferred overlay, the hinge structure supports that alignment in regular use. Elongated holes on both leaves open a window for small shifts during mounting, giving room to slide the hinge slightly to correct reveal variations along the door edge. The frame leaf length of 1-3/4 inches offers enough run for a stable screw spread, which contributes to holding the hinge in place under door weight. The tight screw pin in the five knuckle barrel maintains a controlled pivot, which helps the overlay line stay consistent as the door cycles.
The Rockford Process 374-1D is a free swinging overlay five knuckle semi-concealed institutional hinge, so it serves overlay doors where a visible barrel and smooth swing are required.
The 32 mm hole system design lines the hinge up with standard system boring, which supports repeatable mounting positions on cabinets or frames built to that pattern.
The 1-3/4 inch frame leaf length defines how far the leaf extends on the frame, giving a known area for screw placement and load transfer across the frame surface.
Elongated holes on both leaves allow small adjustments when setting screws, which helps refine door overlay and reveals without changing the bored hole pattern.
The 0.095 inch, or 2.4 mm, material thickness gives the hinge leaves added stiffness, helping them resist bending and maintain door alignment during service.
Hospital grade tips finish the barrel ends with a shaped detail, which supports institutional expectations for smooth, finished hinge tips at the door edge.
The Rockford Process Control, Inc. 374-1D free swinging overlay five knuckle hinge in gloss black combines a 1-3/4 inch frame leaf, 2-3/4 inch barrel height, and 0.095 inch thickness for institutional-style openings. Use its 32 mm hole system layout and elongated holes to align overlay doors across your project.
Sold In: 50 Pair
