CL253-4A 32×25mm SUS304 Stainless Steel 180° Mirror Polished Ultra-Mini Butt Hinge

Full Technical Specifications

Model Number: CL253-4A
Overall Dimensions: 32mm total width × 25mm height × 1.5mm 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: Φ3mm
Mounting Holes: 4 pieces Φ3.3 through holes, center distances 20mm horizontal × 13mm vertical
Side Profile: 1.5mm leaf thickness
Core Features: Ultra-compact micro size, full SUS304 corrosion resistance, mirror polished aesthetic, M3 screw compatible mounting, 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 even in this ultra-miniature size. 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 even the smallest equipment enclosures. 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, jewelry, luxury and consumer-facing applications where appearance is critical.

3 Ultra-Compact Micro Footprint for Space-Critical Applications

With an ultra-compact 32×25mm overall size and slim 1.5mm leaf thickness, this hinge is specifically designed for miniature and space-critical applications where standard-sized hinges simply cannot fit. The micro footprint allows it to be installed on tiny instrument panels, small control boxes, compact device housings and delicate enclosures without occupying valuable internal or external space.

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 even on the smallest enclosures.

5 Four-Point M3 Screw Mounting for Secure Fixation

The 4×Φ3.3 mounting holes are compatible with standard M3 screws, ensuring secure and stable installation on miniature cabinet doors. The 20mm horizontal × 13mm vertical hole spacing provides a balanced fixation pattern that resists loosening from vibration while maintaining the compact overall dimensions.

6 Smooth Precision Rotation with Φ3 Pivot Pin

The precision-machined barrel and Φ3 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 micro construction is optimized for lightweight small cabinet doors and delicate enclosures.

Application Fields

Tiny electrical control boxes, compact junction boxes, miniature PLC enclosures and small distribution cabinets
Medical devices, portable diagnostic instruments, laboratory micro-equipment and environmental monitoring sensors
Miniature communication equipment, small server modules, compact signal transfer enclosures and IoT device housings
Jewelry boxes, luxury packaging, watch cases, premium gift boxes and decorative enclosures
Precision instrument panels, electronic test equipment casings, measurement devices and sensor housings
Small outdoor monitoring equipment, weather-resistant micro-instrument panels and compact coastal sensor enclosures
Premium compact furniture, small electronic casings, handheld devices and decorative enclosures where polished appearance is preferred
Marine micro-equipment, RV accessories, boat fixtures and outdoor miniature devices requiring corrosion-resistant stainless steel hardware
Model making, DIY projects, custom enclosures and precision engineering applications requiring micro-size hinges
Food processing micro-equipment, small stainless steel sanitary boxes and cleanroom mini-enclosures

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
Mark and drill 4×Φ3.3 through holes at 20mm horizontal × 13mm vertical spacing on both the frame and door panel
Align the hinge halves against the mounting surfaces and fasten with M3 screws through all four holes
Test the 180° opening movement for smooth rotation and verify hinge stability
Adjust the hinge position slightly if needed to achieve proper door alignment and consistent gap spacing
Confirm that all screw heads are properly seated and do not interfere with hinge operation

Installation Quantity Recommendation

Door height ≤200mm: Install 2 hinges symmetrically
Door height 200mm to 400mm or medium-weight small 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 Φ3 pivot pin every six months to maintain smooth and quiet rotation
Check M3 mounting screw tightness quarterly to prevent loosening from vibration
Inspect the polished surface annually for scratches or corrosion; for coastal applications, rinse with fresh water periodically to remove salt deposits
Due to the miniature size, avoid over-tightening screws which may cause deformation of the thin hinge plate

Product Summary

CL253-4A is an ultra-compact 32×25mm mini butt hinge manufactured from premium SUS304 stainless steel with precision mirror polishing. Its full stainless steel corrosion resistance, highly reflective polished finish, micro-size space-saving design, four-point M3 screw mounting, Φ3 precision pivot pin and 180° full opening angle make it an ideal hardware solution for tiny electrical cabinets, medical devices, jewelry boxes, laboratory instruments, IoT sensors, outdoor micro-equipment and various precision applications requiring durable micro-size performance and a premium polished appearance.

CL253-4A SUS304 stainless steel mirror polished ultra mini butt hinge 180 degree 4-Φ3.3 mounting holes 32x25mm Φ3 pin tiny small industrial cabinet equipment hinge