Why Choose the Partex URR43 M4 Ring Terminal?
The Partex URR43 is a high-quality uninsulated ring terminal (ring cable lug) designed to provide secure electrical connections between stranded copper conductors and compatible screw or stud terminals. Featuring an M4 stud connection and a 0.5–1.5 mm² conductor capacity, this crimp terminal is ideal for electrical control panels, industrial automation equipment and machinery wiring applications.
As part of the Partex UR uninsulated ring terminal range, the URR43 combines a high-conductivity tin-plated copper construction with a closed-ring design to provide dependable mechanical retention and electrical contact. The tin-plated finish helps resist surface oxidation, while the crimp barrel allows stranded copper conductors to be securely terminated using an appropriately sized crimping tool.
With a 4.3 mm ring hole diameter, 15.8 mm overall length and 4.3 mm crimp barrel length, the Partex URR43 provides a compact connection for M4 threaded studs and screws. Supplied in a convenient pack of 100, these terminals are a practical choice for electricians, control panel manufacturers and maintenance engineers requiring reliable cable termination accessories.
Key Advantages
- Professional uninsulated ring terminal designed for secure electrical cable termination.
- M4 stud connection with a 4.3 mm ring hole for compatible threaded fixings.
- 0.5–1.5 mm² conductor capacity suitable for smaller industrial control and electrical wiring applications.
- Tin-plated copper construction provides good electrical conductivity and resistance to surface oxidation.
- Closed-ring design helps prevent accidental disconnection when the fixing is correctly secured.
- Compact 15.8 mm overall length supports installation in electrical equipment and control assemblies.
- Suitable for industrial control panels, electrical distribution equipment and machinery wiring.
- Supplied in a practical pack of 100 ring terminals.
Key Features
- Partex URR uninsulated ring terminal series.
- 0.5–1.5 mm² conductor size range.
- 22–16 AWG conductor compatibility.
- M4 stud connection with a 4.3 mm ring hole diameter.
- 15.8 mm overall terminal length.
- 8.0 mm ring palm width.
- 4.3 mm crimp barrel length.
- 3.45 mm barrel diameter.
- 0.75 mm palm thickness.
- High-conductivity tin-plated copper construction.
- Uninsulated crimp barrel for secure conductor termination.
- 100 terminals per pack.
Technical Specifications
- Manufacturer: Partex
- Series: URR Uninsulated Ring Terminals
- Model: URR43
- Product type: Uninsulated ring terminal / ring cable lug
- Conductor cross-sectional area: 0.5–1.5 mm²
- Conductor size (AWG): 22–16 AWG
- Stud size: M4
- Ring hole diameter (d2): 4.3 mm
- Overall length (L): 15.8 mm
- Ring palm width (B): 8.0 mm
- Barrel diameter (D): 3.45 mm
- Barrel length (E): 4.3 mm
- Palm thickness (t): 0.75 mm
- Terminal material: Copper
- Surface finish: Tin-plated
- Insulation: Uninsulated
- Terminal configuration: Closed ring
- Connection type: Screw / stud terminal
- Termination method: Crimp connection
- Compatible conductor type: Stranded copper conductor
- Pack quantity: 100 pieces
Secure Electrical Connections with Uninsulated Ring Terminals
Uninsulated ring terminals provide a dependable method of connecting stranded copper conductors to screw and stud terminals. The Partex URR43 features a closed-ring contact with a 4.3 mm mounting hole, designed for use with compatible M4 threaded fixings. Unlike open-ended fork terminals, a closed-ring terminal remains captured around the fixing until the screw or nut is removed, providing additional mechanical security in industrial electrical installations.
The URR43 accommodates 0.5–1.5 mm² stranded copper conductors and features a compact crimp barrel designed for secure conductor attachment. For correct installation, the conductor should be stripped to the appropriate length, inserted fully into the barrel and crimped using a suitable tool and die. The completed connection should be inspected before mounting onto the M4 stud and tightening to the equipment manufacturer's recommended torque. As the terminal is uninsulated, appropriate electrical insulation or protective enclosure arrangements should be provided wherever required.
Typical Applications
- Industrial electrical control panel wiring and assembly.
- PLC cabinets and industrial automation installations.
- Electrical switchgear and distribution equipment.
- Motor control centres and industrial machinery connections.
- M4 screw and stud-mounted electrical terminals.
- Electrical equipment manufacturing and assembly.
- Building management and HVAC control systems.
- Electrical maintenance, refurbishment and cable replacement.
