Cembre 2180310 A3-M12 non-insulated tin-plated copper compression ring terminal for terminating 16 mm² copper conductors onto M12 studs.
£0.82
The Cembre 2180310, also designated as the Cembre A3-M12, is a professional non-insulated copper compression ring terminal designed to terminate 16 mm² copper conductors onto M12 threaded studs. Part of the established Cembre A-M ring terminal series, it provides a secure, low-resistance electrical connection for industrial control panels, switchgear, machinery and power distribution equipment.
Manufactured from high-purity electrolytic copper tube, the Cembre A3-M12 combines excellent electrical conductivity with the mechanical strength required to resist vibration and conductor pull-out. The terminal is annealed to provide the ductility needed during compression crimping and is electrolytically tin plated to improve resistance to oxidation, corrosion and mechanical stress.
The Cembre 2180310 features a 13.2 mm fixing hole for M12 studs, a chamfered barrel entry and an integrated inspection hole. These features simplify conductor insertion and allow installers to confirm that the cable is correctly positioned before crimping, helping create consistent and mechanically reliable terminations.
Compression ring terminals create a permanent electrical connection by mechanically compressing the copper barrel around the conductor strands. Compared with temporary clamping methods, a correctly crimped terminal provides excellent electrical continuity, high pull-out resistance and dependable operation under vibration and thermal cycling.
The Cembre A-M series is engineered for repeatable professional installation. When the A3-M12 is fitted using a compatible crimping tool and the correct die for a 16 mm² conductor, it produces a secure connection suitable for demanding electrical distribution, automation and machinery applications.
| Series | A-M Ring Terminals |
|---|---|
| Manufacturer part number | 2180310 |
| Product type | Non-insulated copper compression ring terminal |
| Conductor cross-section | 16 mm² |
| Approximate AWG equivalent | 6 AWG |
| Compatible conductor | Flexible and low-stranded copper conductor |
| Stud size | M12 |
| Fixing-hole diameter | 13.2 mm |
| Palm width | 20 mm |
| Palm rear to stud centre | 14 mm |
| Stud centre to palm tip | 12 mm |
| Overall length | 44 mm |
| Barrel internal diameter | 5.8 mm |
| Connection angle | 180° / straight |
| Terminal shape | Ring |
| Material | Annealed electrolytic copper tube |
| Copper purity | Greater than 99.9% |
| Copper grade | Cu-OF CW008A |
| Surface treatment | Electrolytic tin plating |
| Installation method | Compression crimping |
| Crimping geometry | Hexagonal or indent |
| Inspection hole | Yes |
| Chamfered barrel entry | Yes |
| Number of fixing holes | 1 |
| Insulated | No |
| Operating temperature | -50 °C to +150 °C |
| RoHS compliant | Yes |
| Certification | cULus |
| HS Code | 85369010 |
| Country of Manufacture | Italy |
The Cembre 2180310 is used to terminate 16 mm² copper conductors onto M12 threaded studs in industrial electrical equipment, switchgear and power distribution systems.
The terminal is designed for 16 mm² flexible and low-stranded copper conductors, equivalent to approximately 6 AWG.
The terminal is designed for M12 studs and bolts and has a nominal fixing-hole diameter of 13.2 mm.
No. The Cembre 2180310 is a non-insulated copper compression ring terminal.
The conductor should be stripped to the appropriate length, inserted fully into the barrel and crimped using a compatible professional compression tool and the correct die for a 16 mm² conductor.
Cembre A-M copper compression terminals are widely used by electrical contractors, panel builders, OEM manufacturers and maintenance engineers to produce secure, durable and electrically efficient cable connections.
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LED Controls is a specialist distributor of factory automation and industrial controls, supplying OEMs, machine builders, panel builders and end users throughout the UK and worldwide. As a trusted UK distributor for many of the world’s leading automation manufacturers, we provide industrial control products, technical expertise and bespoke automation solutions backed by outstanding customer service.
2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...
2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...