Cembre 2145687 RKY-M4 reinforced pre-insulated ring terminal for 0.25–1.5 mm² conductors with M4 stud fixing and anti-vibration construction.
£0.21
The Cembre 2145687 (RKY-M4) is a premium-quality pre-insulated anti-vibration ring terminal designed to provide secure, long-lasting electrical terminations for flexible copper conductors. Manufactured by Cembre, it is specifically engineered for industrial control panels, machinery, automation systems and electrical installations where vibration resistance and connection reliability are essential.
Manufactured from 99.95% pure electrolytic copper with a durable electrolytic tin-plated finish, the RKY-M4 incorporates a reinforced copper sleeve beneath the insulation that improves mechanical retention after crimping. The halogen-free PA6.6 polyamide insulation features a funnel-shaped entry that simplifies conductor insertion while protecting cable strands during installation.
Designed for 0.25–1.5 mm² flexible copper conductors with an M4 stud fixing, the Cembre 2145687 is widely used by panel builders, OEM machine manufacturers and industrial electricians requiring dependable vibration-resistant cable terminations.
Ring terminals provide permanent, vibration-resistant electrical connections that remain securely fastened under demanding operating conditions. Their reinforced construction improves mechanical integrity while maintaining excellent electrical conductivity throughout the service life of the installation.
The Cembre RKY series is widely trusted by industrial electricians, panel builders and OEM manufacturers for machinery, switchgear and automation systems where dependable electrical terminations are essential.
| Series | RKY Reinforced Ring Terminals |
|---|---|
| Part number | 2145687 |
| Product type | Pre-insulated anti-vibration ring terminal |
| Cable size | 0.25–1.5 mm² |
| Stud size | M4 |
| Insulation colour | Red |
| Conductor material | Electrolytic tin-plated copper |
| Insulation material | Halogen-free Polyamide PA6.6 |
| Operating temperature | -20°C to +105°C (110°C short-term) |
| Flammability | UL94 V2 |
| Installation | Crimp termination |
| HS Code | 85369010 |
| Country of Manufacture | Taiwan |
It provides secure crimped ring terminations for flexible copper conductors connected to M4 stud terminals.
The RKY-M4 is designed for flexible copper conductors from 0.25 mm² to 1.5 mm².
The reinforced anti-vibration collar and copper reinforcement sleeve improve the mechanical grip on the conductor, making it ideal for machinery and equipment subject to vibration.
It is manufactured from electrolytic tin-plated copper with durable halogen-free PA6.6 insulation.
The terminal is crimped onto the conductor using an appropriate crimping tool before being secured to an M4 fixing stud.
Cembre electrical connection products are trusted by panel builders, OEM manufacturers and industrial electricians for delivering safe, reliable and professional electrical terminations across demanding industrial environments.
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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...