Cembre 2190290 A5-M16 non-insulated tin-plated copper compression ring terminal for terminating 25 mm² copper conductors onto M16 threaded studs.
£7.74
The Cembre 2190290, also designated as the Cembre A5-M16, is a professional non-insulated copper compression ring terminal designed to terminate 25 mm² copper conductors onto M16 threaded studs. Part of the proven Cembre A-M copper tube terminal series, it provides a secure, low-resistance electrical connection for industrial switchgear, power distribution equipment, control panels and heavy-duty machinery.
Manufactured from annealed electrolytic copper tube with a purity greater than 99.9%, the A5-M16 delivers outstanding electrical conductivity together with excellent mechanical strength. The electrolytic tin-plated finish protects against oxidation and corrosion, while the annealed construction ensures optimum ductility for dependable compression crimping.
The Cembre 2190290 features a 17 mm fixing hole for M16 studs, a chamfered easy-entry barrel and an integrated inspection hole. These design features simplify conductor insertion and allow installers to verify correct cable positioning before crimping, helping produce reliable, long-lasting electrical terminations.
Copper compression terminals create permanent low-resistance electrical joints by mechanically compressing the barrel around the conductor strands. When installed with the appropriate compression tooling and die set, the resulting connection offers excellent conductivity, high pull-out resistance and dependable performance under vibration, thermal cycling and heavy electrical loading.
The Cembre A5-M16 is ideally suited to industrial power distribution systems where larger M16 bolted connections are required. Its annealed copper construction, tin-plated finish and precision-manufactured dimensions ensure consistent installation quality and long service life.
| Series | A-M Ring Terminals |
|---|---|
| Manufacturer part number | 2190290 |
| Product type | Non-insulated copper compression ring terminal |
| Conductor cross-section | 25 mm² |
| Approximate AWG equivalent | 4 AWG |
| Stud size | M16 |
| Fixing-hole diameter | 17 mm |
| Palm width (B) | 26 mm |
| Dimension N | 16 mm |
| Dimension M | 18 mm |
| Dimension I | 43.5 mm |
| Overall length (L) | 59.5 mm |
| Barrel length (A) | 16.5 mm |
| Barrel internal diameter | 10 mm |
| Barrel external diameter | 13 mm |
| Cable stripping length | 19 mm |
| Connection angle | 180° (straight) |
| Terminal shape | Ring |
| Number of fixing holes | 1 |
| Material | Annealed electrolytic copper tube (>99.9% purity) |
| Surface treatment | Electrolytic tin plating |
| Crimping geometry | Hexagonal or indent |
| Maximum voltage rating | 11 kV |
| Operating temperature | -50 °C to +150 °C |
| Inspection hole | Yes |
| Insulated | No |
| RoHS compliant | Yes |
| UL standard | UL 486A-486B |
| HS Code | 85369010 |
| Country of Manufacture | Italy |
The Cembre 2190290 is used to terminate 25 mm² copper conductors onto M16 threaded studs in industrial electrical equipment and power-distribution systems.
The terminal is designed for 25 mm² copper conductors, equivalent to approximately 4 AWG.
No. It is a professional non-insulated copper compression ring terminal.
Yes. The integrated inspection hole allows installers to verify that the conductor has been fully inserted before compression crimping.
The conductor should be stripped to approximately 19 mm, inserted fully into the barrel and crimped using an approved compression tool and the correct die for a 25 mm² Cembre terminal.
Cembre copper compression terminals are trusted worldwide by panel builders, OEM manufacturers, utilities and electrical contractors for secure, durable and electrically efficient cable terminations.
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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...