CL295-2 80×100mm Black PA (Nylon) 180° Heavy-Duty Rounded-Corner Butt Hinge with SUS304 Stainless Steel Pin

Full Technical Specifications

Model Number: CL295-2
Hinge Body Material: Black PA (polyamide / nylon) engineering plastic
Pivot Pin Material: SUS304 stainless steel
Surface Finish: Black (natural PA material color)
Maximum Rotation Angle: 180°
Overall Dimensions: 80mm width × 100mm height × 15.5mm side height
Leaf Thickness: 7.5mm
Mounting Holes: 6 pieces Φ5.6 through holes with Φ11.3 countersunk counterbores (3 per leaf), 50mm horizontal center spacing, 70mm vertical center spacing
Pivot Pin Diameter: Φ6mm
Corner Design: Rounded corners for safe, snag-free edges
Barrel Design: Segmented multi-knuckle barrel for smooth rotation and load distribution
Core Features: Black PA corrosion-resistant construction, SUS304 stainless steel pin, heavy-duty 80×100mm body, rounded corners, six-hole countersunk flush mounting, 180° full opening, segmented barrel, lightweight, chemical resistant, electrically insulating

Core Product Features & Advantages

1 High-Quality Black PA (Nylon) Engineering Plastic Construction

The hinge body is manufactured from PA (polyamide/nylon) engineering plastic, providing excellent corrosion resistance, chemical resistance, electrical insulation and self-lubricating properties. The black PA material is inherently resistant to rust, oxidation and most industrial chemicals, making it ideal for outdoor, chemical processing and harsh environment applications where metal hinges would corrode or degrade.

2 SUS304 Stainless Steel Pivot Pin for Durable Rotation

The pivot pin is fabricated from premium SUS304 stainless steel, providing excellent corrosion resistance, structural strength and long-term durability. The Φ6 precision-machined pin ensures tight clearance, low-friction rotation and minimal wobble, delivering smooth and quiet operation over tens of thousands of open-close cycles even in damp, coastal or mildly corrosive environments.

3 Heavy-Duty 80×100mm Body with Rounded Corners

The substantial 80×100mm body with segmented multi-knuckle barrel design provides robust structural rigidity and reliable load-bearing capacity for medium to heavy cabinet doors. The rounded corner design eliminates sharp edges, improving safety during installation and operation while creating a clean, professional appearance. The segmented barrel distributes the door weight evenly across multiple knuckles, effectively resisting sagging and deformation under long-term use.

4 Six-Hole Countersunk Flush Mounting for Secure Stable Installation

The 6×Φ5.6 mounting holes (3 per leaf) with Φ11.3 countersunk counterbores allow M5 flat head screws to sink completely flush with the hinge surface. This creates a smooth, snag-free exterior that eliminates protruding screw heads, improving safety, aesthetics and ease of cleaning. The six-point fixation pattern (50mm horizontal × 70mm vertical spacing) provides robust, balanced load distribution and stable installation on larger cabinet doors.

5 180° Full Flat Opening Angle for Complete Access

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. The full flat opening is particularly beneficial for applications where maximum access is required.

6 Lightweight, Chemically Resistant and Electrically Insulating

The PA (nylon) construction offers significant advantages over metal hinges: lightweight design reduces overall equipment weight, excellent chemical resistance ensures compatibility with harsh industrial environments, and inherent electrical insulation properties make it safe for electrical and electronic equipment applications. The black material color also provides a clean, professional appearance that matches standard industrial cabinet hardware.

Application Fields

Electrical control cabinets, low-voltage distribution boxes, frequency converter enclosures and PLC equipment housings requiring electrically insulating hinges
CNC machine tool guards, automation equipment protective doors and industrial machinery access panels
Outdoor communication equipment, weather-resistant instrument panels and coastal equipment enclosures
Chemical processing equipment, laboratory analytical instruments and environmental monitoring control boxes
Food processing equipment, stainless steel sanitary cabinets and cleanroom facility enclosures (where non-metallic hinges are preferred)
Marine and boat equipment, RV accessories and outdoor fixtures requiring corrosion-resistant non-metallic hardware
Agricultural machinery, farm equipment access panels and outdoor industrial enclosures
Sheet metal tool cabinets, large industrial console doors and storage enclosures
Electronic equipment casings, consumer electronics and IoT device enclosures requiring lightweight hinges
Larger cabinet doors requiring six-point secure mounting and rounded safe edges

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 6×Φ5.6 through holes (3 per leaf) at 50mm horizontal × 70mm vertical center spacing on both the frame and door panel
Machine countersunk counterbores to Φ11.3 diameter on the mounting surface side to accommodate M5 flat head screws
Align the hinge halves against the mounting surfaces and fasten with M5 flat head screws through all six countersunk holes
Confirm that all screw heads are completely flush with the hinge surface and do not protrude
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
Verify that the segmented barrel rotates smoothly without binding or excessive play

Installation Quantity Recommendation

Door height ≤800mm: Install 2 PA rounded butt hinges symmetrically (top and bottom)
Door height 800mm to 1400mm or medium-weight door: Install 3 hinges (top, middle, bottom) for balanced load distribution
Note: PA hinges have lower load capacity than steel hinges; for heavy doors, use additional hinges or consider metal hinge alternatives

Maintenance Instructions

Suitable for both indoor and outdoor environments, including damp, coastal, chemical and mildly corrosive conditions; PA material offers excellent corrosion resistance
Wipe the black PA surface periodically with a soft dry or slightly damp cloth to remove dust and grease; avoid harsh chemical solvents that may damage the nylon material
The PA material is self-lubricating and generally does not require additional lubrication; the SUS304 pin may benefit from occasional dry lubricant for smooth rotation
Check all 6 M5 countersunk mounting screw tightness quarterly to prevent loosening from vibration
Inspect the PA hinge body annually for any signs of cracking, deformation, UV degradation or excessive wear; replace the hinge if any damage is detected
For prolonged direct outdoor UV exposure, inspect more frequently as PA may experience gradual UV degradation over time
Inspect the SUS304 pivot pin annually for any signs of wear or excessive play
Do not exceed the recommended load capacity or the 180° maximum opening angle, as this may cause damage to the PA hinge body
Avoid exposure to extreme high temperatures (above 80°C continuously) as PA may soften and lose structural rigidity

Product Summary

CL295-2 is a heavy-duty rounded-corner butt hinge manufactured from high-quality black PA (nylon/polyamide) engineering plastic with a robust SUS304 stainless steel pivot pin, featuring 6×Φ5.6 countersunk mounting holes (3 per leaf) with Φ11.3 counterbores for flush M5 screw installation, a substantial 80×100mm segmented barrel body with rounded safe edges and 180° full flat opening angle. Its PA construction provides excellent corrosion resistance, chemical resistance, electrical insulation and lightweight properties, the SUS304 pin ensures durable smooth rotation, the segmented barrel design delivers reliable load distribution, the rounded corners improve safety and aesthetics, and the six-point countersunk flush mounting creates a clean snag-free exterior. With its robust performance and versatile material properties, it is an ideal hardware solution for electrical cabinets, machinery enclosures, outdoor equipment, chemical processing enclosures, communication devices and various industrial applications requiring corrosion-resistant lightweight plastic hardware with a clean rounded black appearance.

CL295-2 black PA nylon heavy duty rounded butt hinge SUS304 pin 180 degree 6-Φ5.6 Φ11.3 countersunk holes 80x100mm industrial cabinet equipment door hinge