CL253-2 50×75mm SUS304 Stainless Steel 180° Mirror Polished Adjustable Butt Hinge

Full Technical Specifications

Model Number: CL253-2
Overall Dimensions: 50mm total width (15mm + 15mm leaves + barrel) × 75mm height × 2mm leaf thickness
Maximum Opening Angle: 180°
Material: SUS304 stainless steel
Surface Finish: Mirror polishing (highly reflective polished finish, corrosion-resistant, premium appearance)
Pivot Pin Diameter: Φ4.5mm
Mounting Holes:
- Adjustable leaf: 3 slotted holes, 12mm length × 6mm width, 27mm vertical spacing
- Fixed leaf: 3 pieces Φ5.4 round holes, 27mm vertical spacing
Hole Center Distances: 27mm + 27mm vertical spacing, 15mm + 15mm horizontal spacing
Side Profile: 2mm leaf thickness
Core Features: Full SUS304 corrosion resistance, mirror polished aesthetic, adjustable slotted mounting holes, 180° full opening

Core Product Features & Advantages

1 Premium SUS304 Stainless Steel Construction

The entire hinge is fabricated from SUS304 stainless steel, providing excellent corrosion resistance, oxidation resistance and structural durability. Suitable for both indoor and outdoor environments, including damp, coastal and mildly corrosive conditions, it maintains reliable performance over years of service without rusting or degrading.

2 Mirror Polished Finish for High-End Aesthetic Appearance

The precision mirror polishing creates a highly reflective, sleek metallic surface that elevates the visual quality of any equipment enclosure. In addition to its premium appearance, the polished surface resists fingerprints, is easy to clean and provides an extra layer of corrosion protection, making it ideal for medical, laboratory and cleanroom applications where hygiene and appearance are critical.

3 Adjustable Slotted Mounting Holes for Precise Door Alignment

One leaf features 3 elongated slotted holes (12mm length), allowing installers to fine-tune the hinge position vertically during and after installation. This adjustability compensates for minor sheet metal fabrication tolerances, enables perfect door alignment and consistent gap spacing, and ensures a professional fit even on complex cabinet assemblies. The other leaf with 3×Φ5.4 round holes provides secure fixed mounting.

4 180° Full Flat Opening Angle

The 180-degree maximum opening angle enables the cabinet door to lay completely flat, eliminating operational blind zones and providing full unobstructed access for internal wiring, component replacement, equipment inspection and routine maintenance work.

5 Robust 50×75mm Plate with Six-Point Mounting

The 50×75mm mounting plate provides a solid surface for reliable load distribution, while the combination of 3 slotted holes and 3 round holes (6 total mounting points) with 27mm vertical spacing ensures secure and stable installation on medium to heavy cabinet doors. The Φ4.5 pivot pin provides smooth rotation and adequate load-bearing capacity.

6 Smooth Precision Rotation

The precision-machined barrel and Φ4.5 pin assembly ensures tight clearance, low-friction rotation and minimal wobble, delivering smooth and quiet operation over tens of thousands of open-close cycles. The robust construction resists sagging and deformation even under repeated use.

Application Fields

Electrical control cabinets, low-voltage distribution boxes, frequency converter enclosures and PLC equipment housings
Medical equipment housings, portable diagnostic devices, laboratory analytical instruments and environmental monitoring control boxes
Communication equipment cabinets, indoor/outdoor server boxes and signal transfer enclosures
Food processing equipment, stainless steel sanitary cabinets and cleanroom facility enclosures
Precision instrument panels, electronic test equipment casings and measurement device housings
Outdoor monitoring equipment, weather-resistant instrument panels and coastal equipment enclosures
Premium furniture, electronic equipment casings and decorative enclosures where polished appearance is preferred
Marine and boat equipment, RV accessories and outdoor fixtures requiring corrosion-resistant stainless steel hardware
Applications requiring adjustable door alignment and consistent gap spacing

Installation & Maintenance Guidelines

Step-by-Step Installation Procedures

Determine the installation positions on both the cabinet frame and door panel according to the dimension drawing
On the cabinet frame: mark and drill 3×Φ5.4 through holes at 27mm vertical spacing for the fixed leaf with round holes
On the door panel: mark and drill 3 holes corresponding to the slotted holes at 27mm vertical spacing
Align the fixed leaf against the cabinet frame and fasten with M5 screws through all 3 round holes
Align the adjustable leaf against the door panel and loosely fasten with screws through the slotted holes
Close the door and adjust the vertical position via the slotted holes to achieve perfect alignment and consistent gap spacing
Once aligned, fully tighten all mounting screws on the adjustable leaf
Test the 180° opening movement for smooth rotation and verify hinge stability

Installation Quantity Recommendation

Door height ≤500mm: Install 2 hinges symmetrically
Door height 500mm to 900mm or medium-weight steel door: Install 3 hinges for balanced load distribution

Maintenance Instructions

Suitable for both indoor and outdoor environments, including damp, coastal and mildly corrosive conditions; for extreme salt spray or strong chemical environments, regular rinsing with fresh water is recommended
Wipe the mirror polished surface periodically with a soft dry or slightly damp microfiber cloth to remove dust, fingerprints and grease; avoid abrasive cleaners or scouring pads that may scratch the mirror finish
Apply a small amount of dry lubricant to the Φ4.5 pivot pin every six months to maintain smooth and quiet rotation
Check mounting screw tightness quarterly to prevent loosening from vibration
Re-check door alignment and gap consistency annually; readjust via the slotted holes if necessary
Inspect the polished surface annually for scratches or corrosion; for coastal applications, rinse with fresh water periodically to remove salt deposits

Product Summary

CL253-2 is a 50×75mm adjustable butt hinge manufactured from premium SUS304 stainless steel with precision mirror polishing. Its full stainless steel corrosion resistance, highly reflective polished finish, innovative slotted-hole adjustable mounting design, six-point fixation and 180° full opening angle make it an ideal hardware solution for electrical cabinets, medical equipment, laboratory instruments, communication devices, outdoor enclosures and various industrial applications requiring durable performance, a premium polished appearance and precise adjustable door alignment.

CL253-2 SUS304 stainless steel mirror polished adjustable butt hinge 180 degree slotted holes 3-Φ5.4 mounting 50x75mm industrial cabinet equipment hinge